Translated - H3C GB0-191 V7.0 [PDF]

Zitiervorschau

1, in the TCP connection shown in the figure, the Z part of SYN should be filled in.

A. a B. b C. a1 D. b1 2. The control protocol port used by FTP by default is . A. 20 B. 21 C. 23 D. 22 3. Use the command to specify the operating system software that will be used for the next boot. A. startup B. boot-loader C. bootfile D. boot startup 4. If a port running STP in an Ethernet switch does not receive or forward data, receives and sends a BPDU, and does not perform address learning, the port should be in the state. A. Blocking B. Listening C. Learning D. Forwarding E. Waiting F. Disable

5. In the switching network as shown, all switches have THE STP protocol enabled. SWA was chosen as the root bridge. According to the information in the figure, The port should be placed in the Blocking state. (Select one or more)

A. P1 of SWC B. P2 of SWC C. P1 of SWD D. P2 of SWD E. Insufficient information to judge 6. The command that configures switch SWA's bridge priority of 0 is . A. (SWA) stp priority 0 B. (SWA-Ethernet1/0/1) stp priority 0 C. (SWA) stp priority 0 D. (SWA-Ethernet1/0/1) stp root priority 0 Which command in the Windows operating system can display ARP table item information? A. display arp B. arp -a C. arp -d D. show arp The customer's network connection is as follows: HostA----GE0/MSR-1--S1/0-----WAN-----S1/0-MSR-2-GE0/0----HostB The two MSR routers are interconnected over a wide area network, and the physical connection is now healthy. The interface S1/0 address for MSR-1 is 3.3.3.1/30, and the interface S1/0 for MSR-2 has a address of 3.3.3.2/30, and the following three static routes are now configured on MSR-1: ip route-static 192.168.1.0 255.255.0 3.3.3.2 ip route-static 192.168.2.0 255.255.0 3.3.3.2 ip route-static 192.168.0.0 255.255.0 3.3.2 Where 192.168.0.0/22 subnets are the LOCAL area network segment where host HostB is located. So what is correct as described below? (Select one or more) A. All three routes are written to the MSR-1 routing table B. Only a third route is written to the MSR-1 route table C. These three routes can be replaced by one route ip route-static 192.168.0.0 255.255.252.0 3.3.2 D. Only the first route is written to the MSR-1 route table

1. The following devices working on the OSI reference model data link layer are. (choose one or more) A. WAN switch B. Router C. Repeater D. Hub Answer: A 2. Which of the following statements about fiber optics are wrong? A. Multimode fiber can transmit light with different incident angles at different wavelengths B. The core of the multimode fiber is finer C. When multimode fiber is used, the maximum transmission distance of the signal is longer than that of the single mode fiber. D. The cost of multimode fiber is lower than that of single mode fiber Answer: BC 3. The broadcast address of the corresponding natural classification network segment of IP address 202.135.111.77 is. Answer: 202.135.111.255 4. During the establishment of the TCP connection as shown, the Z part of the SYN should be filled in.

A. a B. b C. a+1 D. b+1 Answer: D Use The command specifies the operating system software to be used next time. A. startup B. boot-loader C. bootfile D. boot startup Answer: B 5. Generally, the router fragments packets that are longer than the MTU of the interface. In order to detect the line MTU, you can bring Parameter ping Destination address. A. -a B. -d C. -f D. -c Answer: C 6. If an STP-enabled port on the Ethernet switch does not receive or forward data, receive and send BPDUs, and do not perform address learning. The port should be at status. A. Blocking B. Listening C. Learning D. Forwarding E. Waiting F. Disable Answer: B

7. In the switched network as shown, all switches have the STP protocol enabled. The SWA was chosen as the root bridge. According to the information in the figure, The port should be set to the Blocking state. (choose one or more)

A. SW1's P1 B. SW2 of the SWC C. SWD of SWD D. SWD's P2 E. Insufficient information, unable to judge Answer: BD 8. Configure the switch with the bridge priority of the switch SWA as 0. A. [SWA] stp priority 0 B. [SWA-Ethernet1/0/1] stp priority 0 C. [SWA] stp root priority 0 D. [SWA-Ethernet1/0/1] stp root priority 0 Answer: A 11. The IP address 10.0.10.32 and the mask 255.255.255.224 represent one A. Host address B. Network address C. Broadcast address D. None of the above Answer: B 12. The subnet mask of the IP address 132.119.100.200 is 255.255.255.240, which is the broadcast address of the subnet where it is located. A. 132.119.100.207 B. 132.119.100.255 C. 132.119.100.193 D. 132.119.100.223 Answer: A 13. The well-known port number of the transport layer used by TFTP is A. 67 B. 68 C. 69 D. 53 Answer: C 14. Which command can display ARP entry information in the Windows operating system? A. display arp B. arp -a C. arp -d D. show arp Answer: B

15. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN-----S1/0--MSR-2--GE0/0----HostB The two MSR routers are interconnected through the WAN, and the physical connection is now normal. The interface S1/0 address of MSR-1 is 3.3.3.1/30, MSR-2 interface S1/0 address is 3.3.3.2/30, and now the following three static routes are configured on MSR-1: Ip route-static 192.168.1.0 255.255.255.0 3.3.3.2 Ip route-static 192.168.2.0 255.255.255.0 3.3.3.2 Ip route-static 192.168.0.0 255.255.255.0 3.3.3.2 The 192.168.0.0/22 subnet is the LAN segment where the host HostB is located. So what are the correct ones as described below? (choose one or more) A. These three routes will be written to the routing table of MSR-1. B. Only the third route will be written to the routing table of MSR-1 C. These three routes can be replaced by a route ip route-static 192.168.0.0 255.255.252.0 3.3.3.2 D. Only the first route will be written to the routing table of MSR-1 Answer: AC 16. Which of the following routing protocols only cares about the distance and direction of the destination network segment? (choose one or more) A. IGP B. OSPF C. RIPv1 D. RIPv2 Answer: CD 17. Two empty MSR routers are connected as shown in the figure. By configuring the IP address, the GE0/0 interfaces of the two routers can communicate with each other.

Add the following configurations on the two routers: RTA: [RTA]ospf [RTA-ospf-1]area 0 [RTA-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.3 [RTA-GigabitEthernet0/0]ospf dr-priority 2 RTB: [RTB]ospf [RTB-ospf-1]area 0 [RTB-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.3 [RTB-GigabitEthernet0/0]ospf dr-priority Then after the OSPF neighbor state is stable, (choose one or more) A. The OSPF interface has the same priority. The OSPF DR election is not performed on the 192.168.1.0/30 network segment. B. One of the two routers is a DR and one is a BDR. C. One of the two routers is a DR and one is a DRother. D. The neighbor status of the two routers is FULL, 2-Way Answer: B 18. There is a default route in the routing table of the router. The destination network segment and mask are both 0.0.0.0, and the next hop is the S0/0 of the router. Mouth, then the following description of this route is correct A. When the router receives a packet destined for destination address 120.1.1.1, if there is no other exact match in the router table, then the packet will Match this default route B. The route has the shortest mask, so the packet will be forwarded according to the default route only if no other route matches the packet. C. The metric of this route may be 3 D. The priority of this route may be 100. Answer: ABCD

19. On the MSR router running RIP, see the following routing information: display ip routing-table 6.6.6.6 Routing Table : Public Summary Count : 2 Destination/Mask Proto Pre Cost NextHop Interface 6.6.6.0/24 RIP 100 1 100.1.1.1 GE0/0 6.0.0.0/8 Static 60 0 100.1.1.1 GE0/0 At this point, the router receives a packet with a destination address of 6.6.6.6, then A. The packet will match the RIP route in the routing table with priority because it has the longest mask B. The packet will match the RIP route in the routing table with priority because of its high priority. C. The packet will match the static route in the routing table first because it costs Cost small D. The packet will match the static route in the routing table first because it has the shortest mask Answer: A 20. An empty configuration MSR router RTA connects two routers RTB running in OSPF Area 0 through GE0/0 and GE1/0. RTC. The IP addresses of interfaces GE0/0 and GE1/0 of the RTA are 192.168.3.2/24 and 192.168.4.2/24, respectively. Add the following on the RTA Configuration: [MSR-ospf-1] area 0.0.0.0 [MSR-ospf-1-area-0.0.0.0]network 192.168.0 0.0.3.255 [MSR-GigabitEthernet0/0]ospf cost 2 [MSR-GigabitEthernet1/0]ospf dr-priority 0 Then the correct description about the above configuration is. (choose one or more) A. This configuration starts OSPF on GE0/0 and GE1/0 of the MSR router. B. This configuration only starts OSPF on the GE0/0 interface of the MSR router. C. The RTA may become the DR of the network segment where the two GE interfaces reside. D. RTA may only be the DR of the network segment where one GE interface is located. E. Modifying the cost of the interface GE0/0 does not affect the establishment of OSPF adjacencies. Answer: BDE 21. The client host's interface GigabitEthernet0/0 is connected to the LAN host HostA, and its IP address is 192.168.0.2/24; The Serial6/0 interface is connected to the remote end and is currently running normally. The ACL configuration is now as follows: Firewall enable Firewall default permit Acl number 3003 Rule 0 permit tcp Rule 5 permit icmp Acl number 2003 Rule 0 deny source 192.168.0.0 0.0.0.255 Interface GigabitEthernet0/0 Firewall packet-filter 3003 inbound Firewall packet-filter 2003 outbound Ip address 192.168.0.1 255.255.255.0 Interface Serial6/0 Link-protocol ppp Ip address 6.6.6.2 255.255.255.0 Assuming other related configurations are correct, then. (choose one or more) A. HostA cannot ping the two interface addresses on the router. B. HostA cannot ping 6.6.6.2, but can ping 192.168.0.1 C. HostA cannot ping 192.168.0.1, but can ping 6.6.6.2 D. HostA can Telnet to the router Answer: CD

22. In the network environment as shown, perform the following NAT configuration on the RTA: [RTA]acl number 2000 [RTA-acl-basic-2000]rule 0 permit source 10.0.0.0 0.0.0.255 [RTA-acl-basic-2000]nat address-group 1 200.76.28.11 200.76.28.11 [RTA]interface Ethernet0/1 [RTA-Ethernet0/1]nat outbound 2000 address-group 1 After the configuration, both Client_A and Client_B are accessing the server, then the NAT table of the RTA may be.

A.

B.

C.

D.

Answer: D

23. In the network environment shown in the figure, the two routers are connected back to back by serial port. To set the link rate to 2Mbps, the following statement is correct.

A. Need to determine the interface type and the cable meets the V.24 procedure B. Use the baudrate 2048000 command configuration on the synchronization port of the RTA C. Configure using the baudrate 2048000 command on the sync port of the RTB D. Configure using the virtual-baudrate 2048000 command on the sync port of the RTB E. Use the bandrate 2048000 command configuration on the RTA's sync port and use virtual-baudrate 2048000 on the RTB sync port. Command configuration Answer: B 24. When configuring the ISDN DCC, the customer configured the following dialer-rule on his MSR router: [MSR] dialer-rule 1 acl 3000 So which statements are correct about this configuration? (choose one or more) A. Only packets matching ACL 3000 can trigger dialing B. Only packets matching ACL 3000 will be sent by the router over the dial-up link C. There is no definition of permit or deny, configuration error D. The correct configuration should be: [MSR] dialer-rule 1 acl 3000 permit Answer: A 25. The two empty configured MSR routers RTA and RTB are interconnected back to back via their respective Serial1/0 interfaces. Do the following on the two routers Set: RTA: [RouterA-Serial1/0] link-protocol fr ietf [RouterA-Serial1/0] ip address 10.1.1.1 30 [RouterA-Seria11/0] fr map ip 10.1.1.2 30 RTB: [RouterB-Serial1/0] link-protocol fr ietf [RouterB-Serial1/0] interface serial0/0.1 [RouterB-Serial1/0.1] ip address 10.1.1.2 30 [RouterB-Serial1/0.1] fr map ip 10.1.1.1 30 The physical link between the routers is good, so the following statement is correct. (choose one or more) A. DLCI is not configured on both routers. RTB cannot be pinged on RTA. B. Cannot ping 10.1.1.2 on RTA C. You can ping 10.1.1.2 on RTA D. In the above configuration, if only the type of the subinterface serial0/0.1 on the RTB is changed to P2MP, then the ping cannot be performed on the RTA. 10.1.1.2 E. In the above configuration, if only the type of the subinterface serial0/0.1 on the RTB is changed to P2MP, then the RTA can be pinged. 10.1.1.2 Answer: BD 26. The following description of the star network topology is correct.. (choose one or more) A. Star topology is easy to maintain B. In a star topology, failure of one line does not affect computer communication under other lines C. Star topology is highly robust and does not have a single point of failure D. Because the network of the star topology is shared bus bandwidth, performance degradation occurs when the network is overloaded Answer: AB 27. The following description of the star network topology is wrong.. (choose one or more) A. Star topology is easy to maintain B. In a star topology, failure of one line does not affect computer communication under other lines C. Star topology is highly robust and does not have a single point of failure D. Because the network of the star topology is shared bus bandwidth, performance degradation occurs when the network is overloaded Answer: CD

28. The following description of circuit switching and packet switching is correct. . (choose one or more) A. The circuit switching delay is small, and the transmission is strong in real time. B. Circuit switching network resource utilization is high C. Packet switching delay is large, and transmission real-time is poor D. Packet switching network resource utilization is low Answer: AC 29. The following description of circuit switching and packet switching is correct.. (choose one or more) A. Packet switching network resource utilization is low B. Packet switching delay is large, and transmission real-time is poor C. Circuit switching network resource utilization is high D. Low circuit switching delay and strong real-time transmission Answer: BD 30. The delay of the network defines the time it takes for the network to transfer data from one network node to another. Network delay include. A. Propagation delay B. Switching delay C. Media access delay (access delay) D. Queue delay (queuing delay) Answer: ABCD 31. Hub works in the OSI reference model. A. Physical layer B. Data link layer C. Network layer D. Transport layer Answer: A 32. Which of the following layers does the TCP/IP stack include? A. Network layer B. Transport layer C. Session layer D. Application layer E. Network interface layer F. presentation layer Answer: ABDE 33. Devices that implement network interconnection at the network layer are. A. Router B. Switch C. Hub D. Repeater Answer: A 34. In the Open Systems Interconnection Reference Model (OSI), The data stream is transmitted in the form of a frame. A. Network layer B. Session layer C. Transport layer D. Data link layer Answer: D 35. Which of the following advantages does the OSI reference model have? A. The OSI Reference Model provides compatibility and standard interfaces between devices, facilitating standardization. B. The OSI reference model is a theoretical description of the process of information transmission between network devices and defines how to pass hardware and software. Implement each layer of functionality. C. An important feature of the OSI reference model is its hierarchical architecture. A layered design approach can transform large and complex problems into Small and easy to handle problems. D. The above statements are incorrect. Answer: AC

36. Which of the following advantages does the OSI reference model have? A. The OSI Reference Model provides compatibility and standard interfaces between devices, facilitating standardization. B. An important feature of the OSI reference model is its hierarchical architecture. A layered design approach can turn large and complex problems into A problem that is small and easy to handle. C. The OSI reference model is a theoretical description of the process of information transmission between network devices and defines how hardware and software are implemented. Now every layer of functionality. D. The above statements are incorrect. Answer: AB 37. The following statement about the various layers of the OSI reference model is correct.. (choose one or more) A. The physical layer involves the original bit stream transmitted over the communication channel, which defines the mechanical, electrical functions and regulations required to transmit the data. Process and other characteristics. B. The network layer determines the best route for transmitting packets. The key issue is to determine how the packet is routed from the source to the destination. C. The basic function of the transport layer is to establish and maintain virtual circuits, perform error checking and flow control. D. The session layer is responsible for data format processing, data encryption, and the like. E. The application layer is responsible for providing network services to the application. Answer: ABCE 38. The following statement about the various layers of the OSI reference model is wrong.. (choose one or more) A. The physical layer involves the original bit stream transmitted over the communication channel, which defines the mechanical, electrical functions and regulations required to transmit the data. Process and other characteristics. B. The network layer determines the best route for transmitting packets. The key issue is to determine how the packet is routed from the source to the destination. C. The basic function of the transport layer is to establish and maintain virtual circuits, perform error checking and flow control. D. The session layer is responsible for data format processing, data encryption, and the like. E. The application layer is responsible for providing network services to the application. Answer: D 39. The following statement about the various layers of the OSI reference model is correct.. (choose one or more) A. The session layer is responsible for data format processing, data encryption, and the like. B. The basic function of the transport layer is to establish and maintain virtual circuits, perform error checking and flow control. C. The network layer determines the best route for transmitting packets. The key issue is to determine how the packet is routed from the source to the destination. D. The physical layer involves the original bit stream transmitted over the communication channel, which defines the mechanical, electrical functions and regulations required to transmit the data. Process and other characteristics. E. The application layer is responsible for providing network services to the application. Answer: BCDE 40. The following statement about the OSI reference model is correct.. (choose one or more) A. The data of the transport layer is called a frame. B. The data at the network layer is called a segment. C. Data at the data link layer is called a packet. D. The data of the physical layer is called Bit. Answer: D 41. The main function of the OSI reference model physical layer is. (choose one or more) A. Physical address definition B. Establish an end-to-end connection C. Transfer bitstreams between terminal devices, defining voltage, interface, cable standards, and transmission distances, etc. D. Transfer data from one end host to the other end host Answer: C 42. The IP protocol corresponds to the first part of the OSI reference model. Floor. A. 5 B. 3 C. 2 D. 1 Answer: B

43. In the OSI reference model, the function of the network layer is mainly. (choose one or more) A. Transfer the original bit stream on the channel B. Make sure that the information on each side of the other party is correct. C. Determine how the packet is routed from the source to the destination D. Enhance the function of the physical layer data transmission original bit stream, and perform traffic regulation Answer: C 44. Data segmentation is in the OSI reference model Finished. (choose one or more) A. Physical layer B. Network layer C. Transport layer D. Access layer Answer: C 45. Providing end-to-end reliable data transmission and flow control is the OSI reference model. A. Presentation layer B. Network layer C. Transport layer D. Session layer Answer: C 46. In the OSI reference model, encryption is The function. A. Physical layer B. Transport layer C. Session layer D. Presentation layer Answer: D 47. TCP belongs to the OSI reference model. A. Network layer B. Transport layer C. Session layer D. Presentation layer Answer: B 48. UDP belongs to the OSI reference model. A. Network layer B. Transport layer C. Session layer D. Presentation layer Answer: B 49. SPX belongs to the OSI reference model. A. Network layer B. Transport layer C. Session layer D. Presentation layer Answer: B 50. DNS works in the OSI reference model. A. Network layer B. Transport layer C. Session layer D. Application layer Answer: D 51. Connect two switches with an Ethernet cable. If the MDI type of the interconnect port is configured as across, the Ethernet cable should be. A. Only use crossover cable B. Only use straight-through cable C. Parallel and crossover cables are available D. Parallel and crossover cables are not allowed. Answer: A

52. The following statement about Ethernet is correct.. (choose one or more) A. Ethernet is a network based on shared media B. Ethernet adopts CSMA/CD mechanism C. Ethernet transmission distance is short, the longest transmission distance is 500m D. The above statements are incorrect. Answer: AB 53. The standard physical medium for 100BASE-TX is A. Thick coaxial cable B. Thin coaxial cable C. Category 3 twisted pair D. Category 5 twisted pair E. Fiber Answer: D 54. The following is correct in the statement about CSMA/CD.. (choose one or more) A. CSMA/CD is applied in bus-type Ethernet, which mainly solves how to detect conflicts when multiple stations simultaneously transmit data, and ensure data is transmitted in order. Lose the problem. B. When a station connected to an Ethernet wants to transmit a frame, it must wait until the channel is idle, that is, the carrier disappears. C. The station can start transmitting its frames when the channel is idle. D. If two sites start transmitting at the same time, they will hear the signal collision and pause the transmission of the frame. Answer: ABCD 55. Which of the following statements about MAC addresses are correct? A. Ethernet identifies the host with a MAC address B. The MAC address is a logical address that is easy to change. C. The MAC address is solidified in ROM and cannot be changed normally. D. Usually only the terminal host needs the MAC address, and the network device such as the router does not need it. Answer: AC 56. Which of the following statements about MAC addresses are wrong? A. Ethernet identifies the host with a MAC address B. The MAC address is a logical address that is easy to change. C. The MAC address is solidified in ROM and cannot be changed normally. D. Usually only the terminal host needs the MAC address, and the network device such as the router does not need it. Answer: BD 57. Which of the following statements about fiber optics are correct? A. Multimode fiber can transmit light with different incident angles at different wavelengths B. The cost of multimode fiber is lower than that of single mode fiber C. When multimode fiber is used, the maximum transmission distance of the signal is longer than that of the single mode fiber. D. The core of the multimode fiber is finer Answer: AB 58. WLAN (Wireless LAN) is the product of the combination of computer networks and wireless communication technologies. Which of the following are WLAN technology standards?(choose one or more) A. 802.11a B. 802.11b C. 802.11c D. 802.11g Answer: ABD 59. The 802.11b protocol defines 14 channels in the 2.4 GHz band, with overlapping frequencies between adjacent channels. For maximum benefit With the band resources, which group of channels can be used for wireless coverage? (choose one or more) A. 1, 5, 9 B. 1, 6, 11 C. 2, 6, 10 D. 3, 6, 9 Answer: B

60. The 802.11b protocol defines 14 channels in the 2.4 GHz band, with overlapping frequencies between adjacent channels. For maximum benefit With the band resources, which group of channels can be used for wireless coverage? (choose one or more) A. 1, 5, 9 B. 1, 6, 10 C. 2, 7, 12 D. 3, 6, 9 Answer: C 61. Wide-area network interfaces are diverse, and the following descriptions of WAN interfaces are incorrect.. (choose one or more) A. The AV24 protocol interface can work in both the same and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation. B. The BV35 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation. C. The BRI/PRI interface is used for ISDN access. The default link encapsulation is PPP. D. The DG703 interface provides high-speed data synchronization communication services. Answer: B 62. The WAN interface is diverse, and the following description of the WAN interface is correct.. (choose one or more) A. The AV24 protocol interface can work in both the same and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation. B. The BV35 protocol interface can work in both synchronous and asynchronous modes. In the asynchronous mode, the link layer uses PPP encapsulation. C. The BRI/PRI interface is used for ISDN access. The default link encapsulation is PPP. D. The DG703 interface provides high-speed data synchronization communication services. Answer: ACD 63. For the understanding of the way of packet switching, the correct one in the following statement is. (choose one or more) A. Packet switching is a store-and-forward switching based switching method. B. The transmitted information is divided into packets of a certain length and forwarded in units of packets. C. Each packet carries the address identifier of the receiver and the sender, and the packet can be directly forwarded without any operation, thereby improving efficiency. D. Packet switching includes frame-based packet switching and cell-based packet switching Answer: ABD 64. For the understanding of the way of packet switching, the correct one in the following statement is. (choose one or more) A. Packet switching is a type of switching based on cut-through switching. B. The transmitted information is divided into packets of a certain length and forwarded in units of packets. C. Packet switching includes frame-based packet switching and cell-based packet switching D. Each packet carries the address identifier of the receiver and the sender, and the packet can be directly forwarded without any operation, thereby improving efficiency. Answer: BC 65. When a company establishes a corporate network that requires a WAN connection and requires that the bandwidth of the connection be greater than 1 Mbps, which of the following interfaces and protocols are available? AV35 protocol interface and cable, using PPP as the link layer protocol BV35 protocol interface and cable, using Frame Relay as the link layer protocol C. PRI interface and cable, bundle multiple time slots, use PPP as the link layer protocol D. BRI interface and cable, bundle multiple time slots, use PPP as the link layer protocol. Answer: ABC 66. The customer's two routers are connected back to back via V.35 cables. One of the routers has the following interface information: [MSR-Serial0/0]display interface Serial 0/0 Serial0/0 current state: UP Line protocol current state: UP Description: Serial6/0 Interface The Maximum Transmit Unit is 1500, Hold timer is 10 (sec) Internet Address is 6.6.6.1/30 Primary Link layer protocol is PPP LCP opened, IPCP opened -------- Can be known from the above information A. This router has completed PPP negotiation with the remote device and successfully established a PPP link. B. Successful verification of PPP PAP or CHAP between this router and the remote device C. It is already possible to ping the peer address 6.6.6.2 on this router. D. The interface information prompts that the second IP address can also be configured under the interface. Answer: AD

67. The customer's two routers are connected back to back via a V.35 cable and run the PPP protocol on the V.35 interface, one of the roads The following interface information is available on the device: [MSR-Serial0/0]display interface Serial 0/0 Serial6/0 current state: UP Line protocol current state: DOWN ---------- Can guess from the above information A. The physical connection between the two routers is normal, but the PPP negotiation is not successful. B. PPP's LCP negotiation may not pass C. PPP verification may have failed D. The IP addresses of the two router V.35 interfaces may not be on the same network segment. Answer: ABC 68. The WAN main link of a company's MSR router is a synchronous and asynchronous serial port, which is connected to the carrier network through a V.35 cable; Make a backup link with an ISDN BRI interface. So what are the following statements about line bandwidth? A. The bandwidth of the backup line may be 64Kbps. B. The bandwidth of the backup line may be 128Kbps C. The bandwidth of the backup line may be 144Kbps D. The bandwidth of the primary link may be 1Mbps. Answer: ABD 69. ping is actually based on ________ Protocol developed application. A. ICMP B. IP C. TCP D. UDP Answer: A 70. IP address 203.108.2.110 is________ address. A. Class A B. Class B C. Class C D. Class D Answer: C 71. IP address 133.18.2.110 is _______ address. A. Class A B. Class B C. Class C D. Class D Answer: B 72. When the source host pings the destination device, if the network works normally, the destination device will send the packet to the source host after receiving the packet. Respond ICMP Message. A. Echo Request B. Echo Reply C. TTL-Exceeded D. Port-Unreachable Answer: B 73. The broadcast address of the corresponding natural classification network segment of IP address 125.1.1.1 is. Answer: 125.255.255.255 74. The number of available host addresses contained in the corresponding natural classification network segment of IP address 172.15.1.1 is . (Please fill in the Arabic numbers) Answer: 65534 75. IP address 165.110.20.67 The corresponding natural classification network segment contains the number of available host addresses.. (Please fill in the Arabic numerals Answer: 65534

76. Depending on the source, which of the following are the routes in the routing table? A. Interface routing B. Direct routing C. Static routing D. Dynamic routing Answer: BCD 77. The following statement about the IP address is correct.. (choose one or more) A. The IP address can be solidified in the hardware and is unique. B. IP addresses are divided into five categories: A, B, C, D, and E. C. The IP address is usually expressed in dotted hexadecimal, for example: 10.110.192.111 D. The IP address is composed of 32 binary bits. Answer: BD 78. The network address of the corresponding natural classification network segment of IP address 112.1.1.1 is. Answer: 112.0.0.0 79. IP address 192.48.1117.22 The corresponding network address of the natural classification network segment is. Answer: 192.48.117.0 80. The following statement about the IP address is correct.. (choose one or more) A. The IP address consists of two parts: the network number and the host number. B. The network number of the Class A IP address has 8 bits, and the actual variable number of bits is 7 bits. C. Class D IP addresses are usually used as multicast addresses. D. Address Translation (NAT) technology is commonly used to resolve the conversion of Class A addresses to Class C addresses. Answer: ABC 81. The following statement about the IP address is wrong.. (choose one or more) A. The IP address consists of two parts: the network number and the host number. B. The network number of the Class A IP address has 8 bits, and the actual variable number of bits is 7 bits. C. The first octet of a Class C IP address begins with 100. D. Address Translation (NAT) technology is commonly used to resolve the conversion of Class A addresses to Class C addresses. Answer: CD 82. The following statement about the IP address is correct.. (choose one or more) A. The IP address consists of two parts: the network number and the host number. B. The first byte of class A address is 0~126 (127 is reserved for other purposes) C. The IP address is usually expressed in dotted decimal notation, for example: 10.110.168.121 D. The IP address of the host number part binary is 1 is called the network address and is used to identify all hosts of a network. Answer: AC 83. The following statement about IP addresses is correct.. (choose one or more) A. The first byte of class A address is 0~126 (127 is reserved for other purposes) B. The IP address of the host number part with all zeros is called the network address and is used to identify all hosts of a network. C. The IP address is usually expressed in dotted decimal notation, for example: 10.110.168.121 D. The IP address consists of two parts: the network number and the host number. Answer: BCD 84. Which of the following options describes a parameter that uniquely identifies a TCP connection? A. Source port number, source IP address B. Destination port number, destination IP address C. Source port number, destination port number D. Source MAC address, destination MAC address E. None of the above Answer: E 85. TCP protocol passed__________ To distinguish between different connections. A. Port number B. Port number and IP address C. Port number and MAC address D. IP address and MAC address Answer: B

86. The common fields of the UDP protocol and the TCP protocol header are. A. Source IP address B. Flow control C. Checksum D. Serial number E. Destination port F. Source port Answer: CEF 87. The common fields of the UDP protocol and the TCP protocol header are. A. Source port B. Destination port C. Flow control D. Source IP address E. Checksum F. Serial number Answer: ABE 88. During the establishment of the TCP connection as shown, the X part of the SYN should be filled in.

A. a B. b C. a+1 D. b+1 Answer: C 89. During the establishment of the TCP connection as shown, the Y part of the SYN should be filled in. A. a B. b C. a+1 D. b+1 Answer: C 90. During the removal of the TCP connection as shown, the X part of the ACK should be filled in

A. p B. q C. p+1 D. q+1 Answer: C

91. During the removal of the TCP connection as shown, the Y part of the FIN should be filled in. A. p B. q C. p+1 D. q+1 Answer: B 92. The following description of the characteristics of the router is correct. A. is the network layer device B. Routing and forwarding based on link layer information C. Provide a rich interface type D. Can support multiple routing protocols Answer: ACD 93. The following description of the features of Comware is correct.. A. Support IPv4 and IPv6 dual protocols B. Support multiple CPUs C. Routing and switching function fusion D. High reliability and flexibility E. Flexible cut and customization Answer: ABCDE 94. Configure the factory unconfigured MSR router through the console port. The serial port baud rate of the terminal should be set to. A. 9600 B. 2400 C. 115200 D. 38400 Answer: A 95. The following is a description of the VTY features in H3C devices. The correct one is. (choose one or more) A. Only used to Telnet the device B. Each device can support multiple VTY users to access simultaneously C. One physical interface for each VTY user D. No password verification is supported Answer: B 96. SSH uses TCP port number by default. (choose one or more) A. 20 B. 21 C. 22 D. 23 Answer: C 97. If you need to configure the IP address of the Ethernet port on the MSR, you should Under configuration. A. System view B. User view C. Interface view D. Routing Protocol View Answer: C 98. The following is true about the H3C network equipment upgrade. (choose one or more) A. Using Xmodem upgrade can achieve the same speed as FTP B. When using FTP upgrade, the device can only be used as an FTP client. C. When the device cannot be booted to the command line mode and the operating system software needs to be upgraded, only the Xmodem mode can be used. D. In the environment where the interaction between the client and the server is not convenient, you can use TFTP to upgrade. Answer: D 99. The following is a statement about the upgrade of H3C network equipment. The correct one is. (choose one or more) A. Using Xmodem upgrade can achieve the same speed as FTP B. When using FTP upgrade, the device can be used as an FTP server or client. C. Xmodem and TFTP modes can be used when the device cannot boot into command line mode and needs to upgrade the operating system software. D. In the environment where the interaction between the client and the server is not convenient, you can use TFTP to upgrade. Answer: BCD

100. The correct description of the boot process for the router system in the following options is. A. Memory detection ------ start bootrom ------ application decompression ------ - application loading B. Start bootrom ------ memory detection ------ application loading C. Application decompression ------ application loading ------ start bootrom ------ memory detection D. Memory detection ------ application decompression ------ application loading Answer: A 101. A. Application decompression B. Application loading C. Start bootrom D. Memory detection The correct sequence of steps in the startup process of the router system is. (Fill in the code of each step in turn, there can be no spaces in the middle, such as: ABCD Answer: DCAB 102. If you want to upgrade the router without a network cable, you can use the configuration cable to use the HyperTerminal. The agreement is upgraded. A. TFTP B. Xmodem C. Ymodem D. Zmodem Answer: B 103. On the MSR router, the configuration file is The file saved in the format. A. Batch file B. Text file C. Executable file D. Database file Answer: B 104. If the user-specified configuration file does not exist, the router uses Initialize. A. Default configuration B. Last saved configuration C. Most used configuration D. Use the least configuration Answer: A 105. The default data transfer port used by FTP is. A. 20 B. 21 C. 23 D. 22 Answer: A

106. The FTP protocol is based on_________ Agreement. A. UDP B. TCP C. IPX D. SSH Answer: B 107. The TFTP protocol is based on _____________Agreement. A. UDP B. TCP C. IPX D. SSH Answer: A 108. Use on the MSR router. _____ The command can turn off the information center function. A. info-center disable B. undo info-center enable C. disable info-center D. undo info-center Answer: B

109. Telnet users can be configured with different priorities on the MSR router. The mistake about this priority is. (selectOne or more) A. 0 is the access level B. 1 is the monitoring level C. 2 is equipment level D. 3 is the management level E. The smaller the value, the higher the user's priority F. The smaller the value, the lower the user's priority Answer: CE 110. On the MSR router, if you want to modify some configurations after logging in to the device at the access level, you can use The command switches to level 3.(choose one or more) A. super B. level 3 C. password D. login Answer: A 111. When viewing the configuration, if there are more configuration commands and one screen is not displayed, after displaying one screen, you can press Show next page. A. key B. key C. key D. key Answer: D 112. I want to modify the device name, it should be used _________ Command (please write full command). Answer: sysname 113. On the MSR router, by default, the configuration file is ____________ Suffixed. A. .bin B. .sys C. .txt D. .cfg Answer: D 114. Use on MSR Series Routers . ______________ The command displays the current path to the file system. A. dir B. pwd C. path D. current-path Answer: B 115. On the command line, the user wants to return to the previous view from the current view and should use A. return command B. quit command C. key D. key Answer: B 116. Users can use _____ The command views the history commands. A. display history-cli B. display history-area C. display history-command D. display history-cache Answer: C 117. After configuring the Telnet service configuration on the router, the slave PC can ping the router, but the Telnet router fails. Always showing that you are connecting to xxxx, the possible reason is . (choose one or more) A. The intermediate network routing configuration is incorrect. B. Telnet password setting is incorrect C. Router Telnet service is not started D. The intermediate network prevents the PC from initiating a connection to the router's TCP port 23. Answer: CD

118. If you want the current configuration to continue to take effect after the system is restarted, you should use it before restarting the device. _________ The command saves the current configuration to the configuration file. In the piece. (please write the full command) Answer: save 119. On the MSR router, type the first few letters of a keyword for the command, press _________ Can complete the order. A. key B. key C. key D. key Answer: D 120. On the MSR router, if a file has been set as the startup file, you can use _____________ The command checks if the settings are correct. A. display boot B. display begin C. display startup D. display start-configuration Answer: C 121. On the MSR router, if you want to download files from the FTP server, you should use the FTP command. __ command. A. get B. put C. download D. load Answer: A 122. On the MSR router, once the system time is inaccurate, it can be used ____ The command adjusts the system time. A. time B. clock C. clock datetime D. set datetime Answer: C 123. On the MSR router, use ___________ The command checks the current running version of the device. A. display running B. display software C. display version D. display current-version Answer: C 124. On the MSR router, each function module has its corresponding information display command. In general, you need to check the operation of each function module. Line information, you need to run the corresponding display command one by one. In order to collect more information at one time and facilitate daily maintenance or problem location, you can Execution under the view The command displays the statistics of the current main function modules of the system. A. display all B. display ip interface C. display system-information D. display diagnostic-information Answer: D 125. Type during the system startup process as prompted. The system will interrupt booting and enter BootROM mode. A. B. C. D. Answer: B 126. On the MSR router, when the file is deleted using the delete command without parameters, the deleted file will be saved in in. A. RAM B. ROM C. Memory D. Recycle-bin Answer: D

127. On the MSR router, if you want to completely delete an obsolete file in the recycle bin, you can execute it. command. A. keep trash B. reset recycle-bin C. clear all D. reset trash-bin Answer: B 128. On the MSR router, if you want to view the files in the recycle bin, you can use _______ command. A. dir recycle-bin B. dir trash C. dir /all D. dir all-file Answer: C 129. On the MSR router, the -t parameter of the ping command specifies the timeout period of the ICMP Echo Reply packet, in the range of 1 to 65535. The unit is milliseconds, its default value is ______ millisecond. A. 200 B. 100 C. 2000 D. 1000 Answer: C 130. On the MSR router, the -m parameter of the ping command specifies the interval for sending ICMP Echo Request messages, in the range of 1 to 65535, in milliseconds, its default value _______- millisecond. A. 1000 B. 100 C. 200 D. 2000 Answer: C 131. There are two hops from the source device to the destination device. Use the tracert command to detect the path. When the first hop is detected, the source device refers to the destination device. A larger port sends a UDP packet with a TTL of 1. When the packet reaches the middle hop, the TTL will become 0, so the device is sourced. Device responds with an ICMP Message. A. Time Exceeded B. Echo Request C. Echo Reply D. Port Unreachable Answer: A 132. There are two hops from the source device to the destination device. Use the tracert command to detect the path. When detecting the first hop, the source device sends a TTL of The UDP packet of the first hop is sent to the middle. When the second hop is detected, the source device sends a UDP packet with the TTL of 2. The packet first reaches the middle hop. The TTL is decremented to 1. When the message reaches the destination, the TTL will be decremented to 0. At this time, the destination device will send an ICMP. Message to the source, Tell the source device that it has tracked to the destination address. A. Time Exceeded B. Echo Request C. Echo Reply D. Port Unreachable Answer: D 133. On the MSR router, the -tos parameter of the ping command specifies the ToS (Type of Service) in the ICMP Echo Request message. Service type) field value, ranging from 0 to 255. The default value is A. 46 B. 0 C. 63 D. 2 Answer: B

134. After debugging debugging, you can use ___________ The command turns off debugging. A. no debugging all B. undo debugging all C. undo terminal monitor D. undo terminal debugging Answer: B 135. When using the ping command on the MSR router, you can use Parameters to set the length of the sent ICMP message. A. -n B. -c C. -b D. -s Answer: D 136. On the MSR router, if you want to specify the source address of the packet sent during ping, you should use __ parameter. A. -s B. -i C. -a D. -d Answer: C 137. The last ping of the MSR router sends 5 packets by default. If you want to specify the number of packets to be sent, you can use _ parameter. A. -n B. -d C. -s D. -c Answer: D 138. After opening the console to monitor the system information, use __ The command opens the screen output of the debug information. A. terminal monitor B. terminal debugging C. terminal screen D. terminal information Answer: B 139. The XYZ company network is shown. No logical interface is configured on the Router; all hosts can communicate normally. Then In this network Broadcast domain. (Please fill in the Arabic numbers) Answer: 2

140. The XYZ corporate network is shown. No logical interface is configured on the Router; all hosts can communicate normally. Then In this network Conflict domains. (Please fill in the Arabic numbers) Answer: 6 141. The Layer 2 Ethernet switch looks up the entry in the MAC address table that matches the destination destination MAC address, thereby forwarding the frame from the corresponding interface. Go, if the lookup fails, the switch will. A. Discard the frame B. Send the frame out of all ports except the port C. Find the fast forwarding table D. Find the routing table Answer: B

142. The Ethernet frame exchange on the switch relies on the MAC address mapping table. This table can be passed. To build. (choose one or more) A. The switch learns by itself B. Manually add mapping entries C. Exchange location information exchanged between switches D. Spanning Tree Protocol Interactive Learning Answer: AB 143. The MAC address table on a Layer 2 switch is as shown in the figure. When the switch receives a broadcast frame from the E1/0/1 interface, the frame will be sent.(choose one or more)

A. Send out from the E1/0/1 interface B. Send out from the E1/0/2 interface C. Send out from the E1/0/3 interface D. Send out from the E1/0/4 interface E. Send out from all interfaces on the switch F. Direct discard Answer: BCD 144. The MAC address table on a Layer 2 switch is shown in the figure. When the switch receives a destination MAC address from the E1/0/2 interface Address is _____ When the frame is 00-13-72-8E-4E-C4, the switch will frame the frame. (choose one or more) A. Send out from the E1/0/1 interface B. Send out from the E1/0/2 interface C. Send out from the E1/0/3 interface D. Send out from the E1/0/4 interface E. Send out from all interfaces on the switch F. Direct discard Answer: ACD 145. The MAC address table on a Layer 2 switch is shown in the figure. When the switch receives a destination MAC address from the E1/0/2 interface Address is _______- When the frame is 00-13-72-8E-4B-C1, the switch will frame the frame.. (choose one or more) A. Send out from the E1/0/1 interface B. Send out from the E1/0/2 interface C. Send out from the E1/0/3 interface D. Send out from the E1/0/4 interface E. Send out from all interfaces on the switch F. Direct discard Answer: F 146. Which of the following advantages do VLANs have over traditional LANs? A. Reduce the cost of movement and change B. Establish a virtual working group C. Users are not restricted by physical devices, VLAN users can be anywhere in the network D. Limit broadcast packets and increase bandwidth utilization E. Enhance the security of communications F. Enhance the robustness of the network Answer: ABCDEF

147. The method of VLAN division includes. A. Port-based partitioning B. MAC address based partitioning C. Port-based attribute partitioning D. Protocol-based partitioning E. Subnet-based partitioning Answer: ABDE 148. According to the way that the switch processes VLAN data frames, the port types of H3C Ethernet switches are classified into two types. A. access port B. trunk port C. Mirror port D. hybrid port E. monitor port Answer: ABD 149. The following description of the trunk port and link is correct.. (choose one or more) A. The PVID value of the trunk port cannot be modified. B. When a trunk port receives a data frame, when it is checked that the data frame does not have a VLAN ID, the data frame is added with the corresponding PVID value on the port. VLAN ID C. Trunk links can carry data frames with different VLAN IDs D. The data frames transmitted on the trunk link are all with VLAN ID. Answer: BC 150. The following description about the trunk port and link is wrong.. (choose one or more) A. The PVID value of the trunk port cannot be modified. B. When a trunk port sends a data frame, if the data frame does not carry a VLAN ID, the corresponding PVID value is added to the data frame as the VLAN ID. C. Trunk links can carry data frames with different VLAN IDs D. The data frames transmitted on the trunk link are all with VLAN ID. Answer: ABD 151. The following description of the S-type Ethernet switch access ports and links is correct.. (choose one or more) A. access port can belong to multiple VLANs at the same time B. The access link can only carry data frames without VLAN ID C. access link can only carry data frames with VLAN ID D. When the access port receives a data frame without a VLAN ID, the PVID value of the port is added as the VLAN ID of the data frame. Answer: BD 152. To configure trunks on the links between Ethernet switches and allow the transmission of VLAN 10 and VLAN 20 information, they must be exchanged. Onboard configuration. A. [Switch-Ethernet0/1] port link-type trunk B. [Switch] port link-type trunk C. [Switch] port link-type access D. [Switch-Ethernet0/1] port trunk pvid 10 Answer: A 153. If an STP-enabled port on an Ethernet switch does not receive or forward data, it does not send BPDUs and does not perform address learning. Then the port should be in _________status. A. Blocking B. Listening C. Learning D. Forwarding E. Waiting F. Disable Answer: A

154. If a port running STP in an Ethernet switch does not receive or forward data, receive, process, and send BPDUs for address learning. Xi, then the port should be at status. A. Blocking B. Listening C. Learning D. Forwarding E. Waiting F. Disable Answer: C 155. If an STP-enabled port in an Ethernet switch receives and forwards data, it receives, processes, and sends BPDUs for address learning. Then the port should be in _________status. A. Blocking B. Listening C. Learning D. Forwarding E. Waiting F. Disable Answer: D 156. Which of the STP port states listed below are unstable intermediate states? (choose one or more) A. Blocking B. Listening C. Learning D. Forwarding E. Disabled Answer: BC 157. The correct statement about the STP protocol is . (choose one or more) A. The BridgeID value is a combination of the bridge's priority and the bridge's MAC address. The front is the priority, followed by the MAC address. B. The default priority value of the H3C Ethernet switch is 32768. C. The lower the priority value, the lower the priority D. When the priority is the same, the smaller the MAC address, the higher the priority E. BridgeID value will be selected as the root bridge Answer: ABD 158. The correct statement about the STP protocol is. (choose one or more) A. The BridgeID value is a combination of the bridge's priority and the bridge's MAC address. The front is the MAC address followed by the priority. B. The default priority value of the H3C Ethernet switch is 32768. C. The higher the priority value, the lower the priority D. When the priority is the same, the larger the MAC address, the higher the priority E. BridgeID value will be selected as the root bridge Answer: BCE 159. The following statement about STP is correct.. (choose one or more) A. In a complex network, STP consumes a lot of processing resources, which causes the network to not work properly. B. STP eliminates possible path loops in the network by blocking redundant links present in the network C. STP information transfer between BPDUs running STP by passing BPDUs D. STP can activate the blocked redundant backup link to restore network connectivity when the current active path fails. Answer: BCD 160. The correct statement about STP, RSTP and MSTP is. (choose one or more) A. MSTP is compatible with STP and RSTP. B. STP cannot converge quickly. When the network topology changes, the originally blocked port needs to wait for a period of time to become the forwarding state. C. RSTP is an optimized version of the STP protocol. The delay of the port entering the forwarding state is greatly shortened under certain conditions, thereby shortening the network and finally achieving the topology stability. Set the time required. D. MSTP can make up for the shortcomings of STP and RSTP. It can quickly converge and enable traffic of different VLANs to follow their respective paths. This provides a better load sharing mechanism for redundant links. Answer: ABCD

161. The correct statement about STP, RSTP and MSTP is. (choose one or more) A. RSTP is an optimized version of the STP protocol. The delay of the port entering the forwarding state is greatly shortened under certain conditions, thereby shortening the network and finally achieving the topology stability. Set the time required. B. MSTP cannot converge quickly. When the network topology changes, the originally blocked port needs to wait for a period of time to become the forwarding state. C. MSTP is compatible with RSTP, but is not compatible with STP. D. MSTP can make up for the shortcomings of STP and RSTP. It can quickly converge and enable traffic of different VLANs to follow their respective paths. This provides a better load sharing mechanism for redundant links. Answer: AD 162. The characteristics of MSTP are. (choose one or more) A. MSTP is compatible with STP and RSTP. B. MSTP divides a switching network into multiple domains, and multiple spanning trees are formed in each domain. The spanning trees are independent of each other. C. MSTP prunes the loop network into a loop-free tree network to avoid the proliferation and infinite loop of packets in the loop network. A redundant path for data forwarding, which implements load balancing of VLAN data during data forwarding. D. The above statements are incorrect. Answer: ABC 163. The following statement is correct. (choose one or more) A. MSTP and RSTP can recognize each other's protocol packets and are compatible with each other. B. In STP-compatible mode, each port of the device sends STP BPDUs. C. In RSTP mode, each port of the device will send RSTP BPDUs. When it is connected to the STP device, the port will be Automatic migration to work in STP compatibility mode D. In MSTP mode, each port of the device sends MSTP BPDUs. When a port is connected to an STP device, the port is connected to the STP device. The port will automatically migrate to work in STP compatibility mode Answer: ABCD 164. In the switched network as shown, all switches have the STP protocol enabled. According to the information in the figure, which switch will be selected. For the root bridge?

A. SWA B. SWB C. SWC D. Insufficient information, unable to judge Answer: A

165. In the switched network as shown, all switches have the STP protocol enabled. According to the information in the figure, which switch will be selected. For the root bridge?

A. SWA B. SWB C. SWC D. Insufficient information, unable to judge Answer: B 166. In the switched network as shown, all switches have the STP protocol enabled. According to the information in the figure, which switch will be selected. For the root bridge?

A. SWA B. SWB C. SWC D. SWD E. Insufficient information, unable to judge Answer: C

167. In the switched network as shown, all switches have the STP protocol enabled. According to the information in the figure, which switch will be selected . For the root bridge?

A. SWA B. SWB C. SWC D. SWD E. Insufficient information, unable to judge Answer: B 168. In the switched network as shown, all switches have the STP protocol enabled. The SWA was chosen as the root bridge. According to the information in the figure. The port should be set to the Blocking state. (choose one or more)

A. SW1's P1 B. SW2 of SWB C. SW1 of the SWC D. SWC's P2 E. Insufficient information, unable to judge Answer: D 169. In the switched network as shown, all switches have the STP protocol enabled. The SWA was chosen as the root bridge. According to the information in the figure. The port should be set to the Forwarding state. (choose one or more) A. SWA's P1 B. SWA of SWA C. SW1 of the SWC D. SWC's P2 E. Insufficient information, unable to judge Answer: ABC 170. 802.1x defines a port-based network access control protocol and defines only the point-to-point connection between the access device and the access port. The access port can only be a physical port. A. True B. False Answer: B

171. Both VLAN technology and port isolation technologies enable Layer 2 isolation of data. A. True B. False Answer: A 172. Which of the following options are features of MAC address-based 802.1x authentication? A. All access users under the port need to be verified separately B. After the first user under the port goes offline, other users will also be denied access to the network. C. When a user goes offline, only the user cannot use the network D. After the first user under the port is successfully authenticated, other access users can use the network resources without authentication. Answer: AC 173. Which of the following options are port-based 802.1x authentication features? A. All access users under the port need to be verified separately B. After the first user under the port goes offline, other users will also be denied access to the network. C. When a user goes offline, only the user cannot use the network D. After the first user under the port is successfully authenticated, other access users can use the network resources without authentication. Answer: BD 174. The role of link aggregation is. A. Increase link bandwidth. B. Load balancing of data can be achieved. C. Increased link reliability between switches. D. Exchange network loops can be avoided. Answer: ABC 175. A company purchased the switches of the two manufacturers A and B for network engineering implementation. Need to use link aggregation technology between switches of two vendors Surgery. After consulting the relevant documents, it is known that the A manufacturer switch does not support the LACP protocol. In which case, which of the following configuration methods are reasonable? (choose one or more) A. One party configures static aggregation, and one party configures dynamic aggregation. B. One party configures static aggregation, and one party configures dynamic aggregation. C. Both sides configure dynamic aggregation D. Both sides configure static aggregation E. Unable to use link aggregation Answer: D

176. According to the user's needs, the administrator needs to create a new VLAN on the switch SWA, and the VLAN needs to be included. Port Ethernet1/0/2. According to the above requirements, which of the following commands need to be configured on the switch? A. [SWA]vlan 1 B. [SWA-vlan1]port Ethernet1/0/2 C. [SWA]vlan 2 D. [SWA-vlan2]port Ethernet1/0/2 Answer: CD 177. According to user requirements, the administrator needs to configure port 1/0/1 of switch SWA as a trunk port. Which of the following commands is _____________ The correct configuration command? A. [SWA]port link-type trunk B. [SWA-Ethernet1/0/1]port link-type trunk C. [SWA]undo port link-type access D. [SWA-Ethernet1/0/1]undo port link-type access Answer: B 178. Ethernet 1/0/1 of the switch SWA was originally an Access port type and needs to be configured as a Hybrid port type. Which of the following commands is the correct configuration command? A. [SWA]port link-type hybrid B. [SWA-Ethernet1/0/1] port link-type hybrid C. [SWA]undo port link-type trunk D. [SWA-Ethernet1/0/1]undo port link-type trunk Answer: B

179. Port Ethernet 1/0/24 of the switch SWA has been configured as a trunk port type. If you want this port to allow VLAN 2 and Which of the following commands is required to pass VLAN3? A. [SWA]port trunk permit vlan 2 3 B. [SWA-Ethernet1/0/24]port trunk permit vlan 2 3 C. [SWA]undo port trunk permit vlan 1 D. [SWA-Ethernet1/0/24]undo port trunk permit vlan 2 Answer: B 180. If you want to see which VLANs currently exist on the switch, which of the following commands is required? A. [SWA]display vlan all B. [SWA]display vlan C. [SWA]display vlan 1 D. [SWA]display vlan 2 Answer: B 181. After the display vlan 2 command is executed on the switch SWA, the switch output is as follows: display vlan 2 VLAN ID: 2 VLAN Type: static Route interface: not configured Description: VLAN 0002 Tagged Ports: none Untagged Ports: Ethernet1/0/1 Ethernet1/0/3 Ethernet1/0/4 ------------ Can judge from the above output A. Port Ethernet1/0/1 is a trunk port B. VLAN 2 contains ports Ethernet1/0/1, Ethernet1/0/3, and Ethernet1/0/4. C. The data frame with the VLAN2 label needs to be stripped when leaving the port Ethernet1/0/3. D. The current VLAN exists on the switch. Only VLAN 2 Answer: BC 182. The command to start the spanning tree protocol on the switch is. Answer: stp enable 183. The Ethernet 1/0/4 of the switch SWA is connected to a router. The administrator wants to disable the spanning tree function on this port. Which of the following commands is used? A. [SWA]stp disable B. [SWA-Ethernet1/0/4] stp disable C. [SWA] undo stp enable D. [SWA-Ethernet1/0/4] undo stp enable Answer: B 184. Configure the switch SWA to work in the RSTP working mode. A. [SWA]stp mode rstp B. [SWA-Ethernet1/0/4] stp mode rstp C. [SWA] undo stp mode stp D. [SWA-Ethernet1/0/4] undo stp mode stp Answer: A 185. The command to configure the interface Ethernet1/0/1 on the switch SWA as an edge port is. A. [SWA] stp enable edged-port B. [SWA-Ethernet1/0/1] stp enable edged-port C. [SWA] stp edged-port enable D. [SWA-Ethernet1/0/1] stp edged-port enable Answer: D 186. After the display stp command is executed on the switch SWA, the switch output is as follows: [SWA]display stp -------[CIST Global Info][Mode MSTP]------CIST Bridge :32768.000f-e23e-f9b0 Bridge Times :Hello 2s MaxAge 20s FwDly 15s MaxHop 20 - Can judge from the above output . (choose one or more) A. The current switch works in RSTP mode. B. The current switch works in MSTP mode. C. The bridge priority of the current switch is 32768. D. The current switch is the root bridge. Answer: BC

187. A PC is connected to port E1/0/1 of the switch SWA. If you want the switch to locally authenticate the PC through the 802.1X protocol, then _______________ What commands need to be configured on the switch? A. [SWA]dot1x B. [SWA]dot1x interface ethernet1/0/1 C. [SWA]local-user localuser D. [SWA-luser-localuser]password simple hello E. [SWA-luser-localuser]service-type lan-access Answer: ABCDE 188. The PCA and PCB are connected to Ethernet 1/0/2 and Ethernet 1/0/3 of the SWA of the S3610 switch respectively. Ethernet 1/0/1 is connected. If you use port isolation technology to isolate PCs from each other, but PCs can access the server, you need to be on the switch. Which commands are configured on? A. [SWA] port-isolate enable B. [SWA-Ethernet1/0/2] port-isolate enable C. [SWA-Ethernet1/0/3] port-isolate enable D. [SWA-Ethernet1/0/1] port-isolate uplink-port Answer: BCD 189. The PC is connected to port E1/0/2 of the switch SWA with an IP address of 10.1.1.1 and a MAC address of 00-01-02-01-2123. For network security, you need to configure MAC+IP+ port binding on port E1/0/2. Which of the following commands is correct? A. [SWA] user-bind ip-address 10.1.1.1 B. [SWA-Ethernet1/0/2]user-bind ip-address 10.1.1.1 C. [SWA] user-bind ip-address 10.1.1.1 mac-address 0001-0201-2123 D. [SWA-Ethernet1/0/2]user-bind ip-address 10.1.1.1 mac-address 0001-0201-2123 Answer: D 190. Create an aggregation port with port 1/0/1 and ID 2 on the S3610 switch. The correct command is. A. [SWA] interface bridge-aggregation 2 B. [SWA] interface bridge-aggregation 2 port Ethernet1/0/1 C. [SWA-Ethernet1/0/1] interface bridge-aggregation 2 D. [SWA-Ethernet1/0/1] interface bridge-aggregation 2 mode static Answer: B 191. As shown, the S3610 switch SWA uses ports E1/0/1 and E1/0/2 to connect to another switch SWB. In order to increase bandwidth Static link aggregation needs to be configured on the switch. Which of the following configurations is correct?

A. [SWA] interface bridge-aggregation 1 B. [SWA-Ethernet1/0/1] port link-aggregation group 1 C. [SWA-Ethernet1/0/2] interface bridge-aggregation 1 D. [SWA]interface bridge-aggregation 1 port Ethernet1/0/1 Ethernet1/0/2 Answer: AB

192. After the display command is executed on the switch SWA, the switch output is as follows: display link-aggregation summary Aggregation Interface Type:

Can judge from the above output. (choose one or more) A. The type of the aggregation group is static aggregation. B. The type of the aggregation group is dynamic aggregation. C. The aggregation group contains 3 active ports. D. There are no active ports in the aggregation group Answer: AC 193. To set a subnet mask so that 192.168.0.94 and 192.168.0.116 are not on the same network segment, the subnet mask used may be (choose one or more) A. 255.255.255.192 B. 255.255.255.224 C. 255.255.255.240 D. 255.255.255.248 Answer: BCD 194. To set a subnet mask so that 192.168.0.94 and 192.168.0.116 are on the same network segment, the subnet mask used may be A. 255.255.255.192 B. 255.255.255.224 C. 255.255.255.240 D. 255.255.255.248 Answer: A 195. To set a subnet mask so that 192.168.0.78 and 192.168.0.94 are on the same network segment, the subnet mask used may not be.(choose one or more) A. 255.255.255.128 B. 255.255.255.192 C. 255.255.255.224 D. 255.255.255.240 Answer: D 196. The default subnet mask for Class A addresses is A. 255.0.0.0 B. 255.255.0.0 C. 255.255.255.0 D. The above is not correct Answer: A 197. The default subnet mask for Class B addresses is A. 255.0.0.0 B. 255.255.0.0 C. 255.255.255.0 D. The above is not correct Answer: B 198. Subnetting a Class B network segment. If the subnet mask is 19 bits, the maximum number of hosts that each subnet can accommodate is (Please fill in the Arabic numbers) Answer: 8190 199. Subnetting a Class B network segment. If the subnet mask is 19 bits, the maximum number of subnets that can be divided is. (please fill in Write Arabic numerals) Answer: 8

200. Subnetting a Class B network segment. If the subnet mask is 22 bits, the maximum number of hosts that each subnet can accommodate is (Please fill in the Arabic numbers) Answer: 1022 201. Subnetting a Class C network segment. If the subnet mask is 28 bits, the maximum number of hosts that each subnet can accommodate is (Please fill in the Arabic numbers) Answer: 14 202. The IP address 10.0.10.63 and the mask 255.255.255.224 represent one. A. Host address B. Network address C. Broadcast address D. None of the above Answer: C 203. The IP address 10.0.10.65 and the mask 255.255.255.224 represent one A. Host address B. Network address C. Broadcast address D. None of the above Answer: A 204. An enterprise network administrator needs to set a subnet mask to divide the responsible Class C network 211.110.10.0 into a minimum of 8 subnets. Q. How many subnet masks can I divide? A. 28 B. 27 C. 26 D. 29 E. 25 Answer: ABD 205. An enterprise network administrator needs to set a subnet mask to divide the responsible Class C network 211.110.10.0 into a minimum of 10 subnets. Q. How many subnet masks can I divide? (choose one or more) A. 28 B. 27 C. 26 D. 29 E. 25 Answer: AD 206. An enterprise network administrator needs to set a subnet mask to divide the responsible Class C network 211.110.10.0 into subnets, requiring each sub. The number of hosts on the network is not less than 20. How many subnet masks can I divide? (choose one or more) A. 28 B. 27 C. 26 D. 29 E. 25 Answer: BCE 207. A company network administrator needs to set a subnet mask to divide the responsible Class C network 211.110.10.0 into 14 subnets, requiring Subnet contains as many hosts as possible, then he should adopt The subnet mask of the bit. (Please fill in the Arabic numbers) Answer: 28 208. The XYZ company administrator is subnetting the office network. It is required to divide a Class C network segment into several equal-sized subnets for each department. User use, but does not limit the size of the subnet, you can have Kind of division method. (Please fill in the Arabic numbers) Answer: 6 209. The XYZ company administrator is subnetting the office network. It is required to divide a Class B network segment into several equal-sized subnets for each department. User use, but does not limit the size of the subnet, you can haveKind of division method. (Please fill in the Arabic numbers) Answer: 14

210. Which part of the subnetting technique is added based on the division of the natural classification IP address? A. Network number part B. Host number part C. Subnet number part D. The above answers are not correct. Answer: C 211. Requires a subnet mask to divide the Class B network 172.16.0.0 into as many subnets as possible, each subnet requires 15 hosts Machine, then the subnet mask should be. (in dotted decimal notation) Answer: 255.255.255.224 212. Requires a subnet mask to divide a Class B network 172.16.0.0 into as many subnets as possible, each of which requires 500 units Host, the subnet mask should be. (in dotted decimal notation) Answer: 255.255.254.0 213. Requires a subnet mask to divide a Class B network 172.16.0.0 into seven subnets. The number of hosts to be accommodated in each subnet is as much as possible. More, the subnet mask should be . (in dotted decimal notation) Answer: 255.255.224.0 214. Requires a subnet mask to divide a Class B network 172.16.0.0 into 30 subnets, each host to accommodate as many hosts as possible More, the subnet mask should be. (in dotted decimal notation) Answer: 255.255.248.0 215. The subnet mask of the IP address 132.119.100.200 is 255.255.255.224, which IP subnet address is A. 132.119.100.0 B. 132.119.100.192 C. 132.119.100.193 D. 132.119.100.128 Answer: B 216. The subnet mask of the IP address 132.119.100.200 is 255.255.255.224, which is the broadcast address of the subnet it is on. A. 132.119.100.255 B. 132.119.100.225 C. 132.119.100.193 D. 132.119.100.223 Answer: D 217. The subnet mask of the IP address 132.119.100.200 is 255.255.255.240, which IP subnet address is A. 132.119.100.0 B. 132.119.100.193 C. 132.119.100.192 D. 132.119.100.128 Answer: C 218. The IP address of a host is 130.25.3.135 and the subnet mask is 255.255.255.192, then the network address of the subnet where the host is located for. A. 130.25.0.0 B. 130.25.3.0 C. 130.25.3.128 D. 130.25.3.255 Answer: C 219. If the all 0s and all 1 subnets can be used as valid subnets, the Class C address 192.168.1.0 is subnetted with a 26-bit subnet mask. The number of valid subnets divided is A. 2 B. 4 C. 6 D. 8 Answer: B 220. If the all 0s and all 1 subnets can be used as valid subnets, the Class C address 192.168.1.0 is subnetted with a 27-bit subnet mask. The number of valid subnets divided is. A. 2 B. 4 C. 6 D. 8 Answer: D

221. Subnet a Class C network. If all 0s and all 1 subnets are not valid subnets, then the network is subdivided with a 26-bit mask. Network division, the number of valid subnets that can be divided is . (Please fill in the Arabic numbers) Answer: 22 222. Compared to standard subnetting, the biggest difference between variable length subnet mask partitioning (VLSM) is. A. For a naturally classified IP network, subnet masking can be performed with a subnet mask of any length B. After subnetting a natural classification IP network, the subnet mask length of each subnet can be different. C. Can form a super network D. Using classless addresses for network partitioning Answer: B 223. In the subnetting, which part of the natural classification IP address is occupied by the subnet number part? A. Network number part B. Host number part C. Subnet number part D. The above is not correct Answer: B 224. Among the following domain names that belong to the FQDN is. A. .www.abc.com B. www.abc.com.cn C. www.abc.com D. www.abc.com. Answer: D 225. The transport layer protocol that DNS can use is. A. TCP B. UDP C. TCP or UDP D. NCP Answer: C 226. The well-known port number of the transport layer protocol adopted by DNS is. A. 50 B. 55 C. 53 D. 51 Answer: C 227. The DNS name server can complete the resolution of the domain name to the IP address. The server that can provide the authority information of the specific domain name mapping is definitely. A. Local domain name server B. Primary domain name server C. Root Domain Name Server D. Authorized domain name server Answer: D 228. A DNS client queries the local domain name server for the IP address of www.sina.com .cn. The local domain name server usually uses that kind of DNS. How to respond by query? A. Recursive query B. Iterative query C. Reverse query D. Fuzzy query Answer: A 229. The following domain names are expressed correctly. A. www.95588.com B. 111.222.333.cn C. www.China_Finance.com D. KK114.com.cn Answer: ABD 230. The following statement is correct. A. FTP data connection remains open throughout the FTP session B. FTP's control connection remains open throughout the FTP session C. FTP data connection is closed after the data transfer ends D. The FTP control connection is closed after the data transfer ends.

231. The role of FTP data connections includes A. The client sends a file to the server B. The server sends the file to the client C. The server sends a list of files to the client D. The server transmits alarm information to the client Answer: ABC 232. The following statement is correct A. The active transfer mode of FTP is initiated by the FTP client to establish a data connection to the server. B. The active transmission mode of FTP is initiated by the FTP server to establish a data connection to the client. C. FTP passive transmission mode server and client use temporary port to establish data connection D. Passive transfer mode of FTP using the PORT command E. Passive transfer mode of FTP using the PASV command Answer: BCE 233. FTP common file transfer types include A. ASCII code type B. Binary type C. EBCDIC type D. Local type Answer: AB 234. After receiving the DHCP ACK message, the DHCP client will find that the IP address it is about to use already exists on the network. What message is sent by the DHCP server? A. DHCP Request B. DHCP Release C. DHCP Inform D. DHCP Decline Answer: D 235. The DHCP client sends to the DHCP server. Is the message updated for the IP lease? A. DHCP Request B. DHCP Release C. DHCP Inform D. DHCP Decline E. DHCP ACK F. DHCP OFFER Answer: A 236. If the broadcast flag in the DHCP Discovery message sent by the DHCP client to the DHCP relay is 0, then DHCP The DHCP Offer message is sent in response to the DHCP client. A. unicast B. broadcast C. multicast D. anycast Answer: A 237. Packets used for interaction between the DHCP relay and the DHCP serve. A. unicast B. broadcast C. multicast D. anycast Answer: A 238. Adoption of IPv6. Representation to represent the address. A. Colon hexadecimal B. Dotted decimal C. Colon decimal D. Dot hexadecimal Answer: A 239. The IPv4 address contains the network part, the host part, the subnet mask, and so on. Correspondingly, the IPv6 address contains A. Network part, host part, network length B. prefix, interface identifier, prefix length C. prefix, interface identifier, network length D. Network part, host part, prefix length

240. The IPv6 link-local address belongs to Address type. A. Unicast B. Multicast C. Broadcast D. Anycast Answer: A 241. IPv6 site-local address belongs to __________ Address type. A. Unicast B. Multicast C. Broadcast D. Anycast Answer: A 242. The router discovery function in the IPv6 Neighbor Discovery Protocol refers to . A. The host discovers the IPv6 address of the router in the network B. The host discovers the prefix and other configuration parameters of the router and its network. C. The router discovers the IPv6 address of the host in the network D. The router discovers the prefix and other configuration parameters of the host in the network. Answer: B 243. IPv6 Host A wants to communicate with IPv6 Host B, but does not know the link-layer address of Host B, and sends a Neighbor Solicitation message. Neighbor request. The destination address of the message is. A. Broadcast address B. All host multicast addresses C. Host A's requested node multicast address D. Host B's requested node multicast address Answer: D 244. Which of the following is true for the compressed expression of the IPv6 address 2001:0410:0000:0001:0000:0000:0000:45FF? (selected Choose one or more) A. 2001:410:0:1:0:0:0:45FF B. 2001:41:0:1:0:0:0:45FF C. 2001:410:0:1::45FF D. 2001:410::1::45FF Answer: AC 245. Which of the following is true for the compressed expression of the IPv6 address 2001:0410:0000:0001:0000:0001:0000:45FF? (selected Choose one or more) A. 2001:410:0:1:0:1:0:45FF B. 2001:41:0:1:0:1:0:45FF C. 2001:410:0:1::45FF D. 2001:410::1::45FF Answer: A 246. Which of the following are correct IPv6 addresses? (choose one or more) A. 2001:410:0:1:45FF B. 2001:410:0:1:0:0:0:0:45FF C. 2001:410:0:1:0:0:0:45FF D. 2001:410:0:1::45FF Answer: CD 247. Which of the following are correct IPv6 addresses? (choose one or more) A. 2001:410:0:1::45FF B. 2001:410:0:1:0:0:0:0:45FF C. 2001:410:0:1:0:0:0:45FF D. 2001:410:0:1:45FF E. 2001:410::1:0:0:0:45FF Answer: ACE 248. The functions implemented by the IPv6 Neighbor Discovery Protocol include. (choose one or more) A. Address resolution B. Router discovery C. Address autoconfiguration D. Establish a Master/Slave relationship E. Address repeat detection

249. Which of the following messages are used in IPv6 address resolution? (choose one or more) A. Neighbor request message B. Neighbor Notification Message C. Router request message D. Router Advertisement Message Answer: AB 250. After the display command is executed on the switch SWA, the switch output is as follows: display arp all

Can judge from the above output. A. The host with IP address 172.16.0.1 is connected to port GE0/0 B. The host with MAC address 001c-233d-5695 is connected to port GE0/1 C. The above entries are statically configured by the administrator. D. The above entries are dynamically generated by the switch. Answer: AD 251. As shown, the router RTA is connected to PCA and PCB. If you need to enable ARP proxy on RTA to enable RTA to be on PC. Which of the following configurations is correct when forwarding ARP packets? (choose one or more)

A. [RTA] proxy-arp enable B. [RTA-GigabitEthernet0/0] proxy-arp enable C. [RTA-GigabitEthernet0/1] proxy-arp enable D. [RTA] proxy-arp enable port G1/0/1 Answer: BC 252. The correct configuration command to enable the DHCP service on the router is A. [Router] dhcp B. [Router-dhcp-pool-0] dhcp C. [Router] dhcp enable D. [Router-dhcp-pool-0] dhcp enable Answer: C 253. After enabling DHCP on the router RTA, you need to set the address pool address range to 192.168.1.0/24, and assign the default gateway to the host. The address is 192.168.1.254. Which of the following configurations can meet these requirements? A. [Router] dhcp server ip-pool 0 B. [Router-dhcp-pool-0] network 192.168.1.0 mask 255.255.255.0 C. [Router-dhcp-pool-0] gateway-list 192.168.1.254 D. [Router-dhcp-pool-0] dns-list 192.168.1.10 Answer: ABC 254. Execute the following configuration commands on the router: [Router] dhcp enable [Router] server forbidden-ip 192.168.1.10 [Router] server forbidden-ip 192.168.1.254 [Router] dhcp server ip-pool 0 [Router-dhcp-pool-0] network 192.168.1.0 mask 255.255.255.0 [Router-dhcp-pool-0] gateway-list 192.168.1.254 [Router-dhcp-pool-0] dns-list 192.168.1.10 [Router-dhcp-pool-0] expired day 5 After completing the above configuration, which of the following statements are correct? A. The router has a DHCP relay function B. There are 252 addresses that the router can assign to the host. C. Router has DHCP server function D. The host can obtain the DNS server address 192.168.1.10 from the router through the DHCP service.

255. Which of the following is true about the description of the MSR routing table? A. If there are multiple sources for the route to the same destination network segment, only the route with the lowest Preference value is written to the routing table. B. If the route to the same destination network segment has multiple sources, only the route with the smallest metric value is written to the routing table. C. If there are multiple sources for the route to the same destination network segment, only the route with the highest Preference value is written to the routing table. D. If the route to the same destination network segment has multiple sources, only the route with the largest metric value is written to the routing table. E. If the same routing protocol finds multiple paths to the same destination network segment, then these routes may be written to the routing table. F. If the same routing protocol finds multiple paths to the same destination network segment, then all of these routes may not be written to the routing table. Answer: AE 256. Which of the following is true about the description of the MSR routing table? A. If there are multiple sources for the route to the same destination network segment, only the route with the highest Preference value is written to the routing table. B. If the route to the same destination network segment has multiple sources, only the route with the largest metric value is written to the routing table. C. If there are multiple sources for the route to the same destination network segment, only the route with the lowest Preference value is written to the routing table. D. If the route to the same destination network segment has multiple sources, then only the route with the smallest metric value is written to the routing table. E. If the same routing protocol finds multiple paths to the same destination network segment, then all of these routes may not be written to the routing table. F. If the same routing protocol finds multiple paths to the same destination network segment, then these routes may be written to the routing table. Answer: CF 257. If the packet matches multiple routing entries in the routing table of the MSR router, then the order of the preferred routes is correctly described. A. The smaller the Preference value, the better the route. B. The smaller the value, the better the route is. C. The shorter the route, the higher the priority of the route D. The longer the route is, the higher the priority of the route Answer: D 258. A default route A is configured on a MSR router running RIP with a next hop address of 100.1.1.1; The RIP learns from the neighbor router that a next hop address is also the default route B of 100.1.1.1. The router uses the default for the routing protocol. Recognition priority and cost value, then A. There will be only route B in the router's routing table because dynamic routing takes precedence. B. There is only route A in the routing table of the router because route A has a high priority. C. In the routing table of the router, only route A, because the cost of route A is 0. D. Both route A and route B are written to the routing table because they have different sources and do not conflict with each other. Answer: B 259. Which of the following sources may be routed in the routing table of an MSR router? A. Routing of directly connected network segments B. Static route manually configured by the network administrator C. Routes discovered by dynamic routing protocols D. Routes discovered by the network layer protocol Answer: ABC

260. The routing table is seen on an MSR router as follows:

Then the analysis of this routing table is correct A. The IP address of the interface GE0/0 on the router is 100.1.1.1. B. The next hop of the route with the destination network segment being 8.8.8.8/32 is InLoop0, indicating that the next hop of the route is a virtual interface similar to Null0. Black hole routing C. The router is running RIPv1 because the mask of the destination segment 30.0.0.0 is a natural mask. D. The routing table is not the complete routing table of the router. The complete routing table should have at least the direct network segment route of interface GE0/0. Answer: D 261. The Serial 0/0 and Serial 0/1 interfaces of the router of XYZ Shenzhen Branch are connected to two different networks through two WAN lines. The ISP, through both ISPs, has access to the Beijing head office's website 202.102.100.2. The following statics are configured on the router of the Shenzhen branch. State routing: Ip route-static 202.102.100.2 24 Serial 0/0 Ip route-static 202.102.100.2 24 Serial 0/1 So what are the descriptions of the two routes correct? A. Traffic to Beijing can be load-sharing through these two routes. B. The two routes to Beijing can be backed up each other. C. Only the second route is written in the routing table of the router. D. Only the first route is written in the routing table of the router. Answer: AB 262. The Serial 0/0 and Serial 0/1 interfaces of the routers of XYZ Shenzhen Branch are connected to two different networks through two WAN lines. ISP, through these two ISPs, they can access the website of Beijing Head Office 202.102.100.2, and configure the following static on the router of Shenzhen branch. State routing: Ip route-static 202.102.100.2 24 Serial 0/0 preference 10 Ip route-static 202.102.100.2 24 Serial 0/1 preference 100 So what are the descriptions of the two routes correct? A. The priority of the two routes is different. The router writes the first route with the highest priority to the routing table. B. The priorities of the two routes are different. The router writes the second route with the highest priority to the routing table. C. The cost of the two routes is the same. D. The destinations of the two routes are the same, and the primary route can be implemented. The first route is the primary route. Answer: ACD

263. The Serial0/0 interface of the router MSR1 of XYZ Shenzhen Branch is directly connected to the ISP router MSR2 through the WAN line. of Serial0/0 interface, the address of Serial0/0 of MSR2 is 100.126.12.1. XYZ company can access Beijing head office through this ISP Website 202.102.100.2. The routing protocol is not running on MSR1. Only one static route is configured as follows: Ip route-static 202.102.100.2 24 100.126.12.1 So what is the description of this route and the MSR1 routing table? A. If the network segment address of 100.126.12.1 is unreachable, the route will not be written to the routing table. B. The route is written to the routing table as long as the physical state of the outbound interface corresponding to the route is up. C. If the outbound interface corresponding to the route is broken, the route must be deleted from the routing table. D. This is a static route with a priority of 60 and a cost of 0. Answer: ACD

264. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN-----S1/0--MSR-2--GE0/0----HostB Both routers are factory default. Configure the correct IP address for each of the four interfaces of the router. Both hosts HostA and HostB are configured. The IP address and gateway are properly configured, assuming all physical connections are normal, then. (choose one or more) A. Each router must be configured with at least one static route to implement interworking between HostA and HostB. B. Each router must be configured with at least 2 static routes to implement interworking between HostA and HostB. C. No route is configured on the router. HostA can ping the IP address of interface S1/0 of MSR-2. D. No route is configured on the router. HostA can ping the IP address of interface S1/0 of MSR-1. Answer: AD 265. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The router MSR-1 and the router MSR-2 are interconnected through a dedicated line. The following three static routes are configured on the MSR-1: Ip route-static 10.1.1.0 255.255.255.0 3.3.3.1 Ip route-static 10.1.1.0 255.255.255.0 3.3.3.2 Ip route-static 10.1.1.0 255.255.255.0 3.3.3.3 Where 10.1.1.0/24 is the LAN segment where Host HostB is located, so which ones are correct as described below? A. Only the third route will be written to the routing table of MSR-1 B. These three routes will be written into the routing table of MSR-1 to form an equivalent route. C. Only the first route will be written to the routing table of MSR-1 D. None of the above Answer: D 266. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB The two MSR routers are interconnected through the WAN, and the physical connection is now normal. The interface S1/0 address of MSR-1 is 3.3.3.1/30, MSR-2 interface S1/0 address is 3.3.3.2/30, and now the following four static routes are configured on MSR-1: Ip route-static 192.168.1.0 255.255.255.0 3.3.3.2 Ip route-static 192.168.2.0 255.255.255.0 3.3.3.2 Ip route-static 192.168.3.0 255.255.255.0 3.3.3.2 Ip route-static 192.168.4.0 255.255.255.0 3.3.3.2 The 192.168.0.0/22 subnet is the LAN user network segment of the MSR-2. So what are the errors described below? (choose one or more) A. These four routes will be written to the routing table of MSR-1. B. Only the fourth route will be written to the routing table of MSR-1 C. These four routes can be replaced by a route ip route-static 192.168.1.0 255.255.252.0 3.3.3.2 D. Only the first route will be written to the routing table of MSR-1 Answer: BCD 267. The customer's network connection is as follows: N1-----MSR-1-----MSR-2----MSR-3-----N2 The following static routes are configured on MSR-1: Ip route-static 192.168.100.0 255.255.0.0 null0 So the correct explanation for this route is. A. On this router, all packets whose destination address belongs to 192.168.100.0/16 will be discarded. B. In some cases, this route can avoid loops C. The static route always exists in the routing table. D. If this static route is matched, the packet will be discarded and no information will be returned to the source address. Answer: BD 268. Customer's network connection is like: HostA------MSR-1------MSR-2--------MSR-3------HostB The configuration of the IP address has been completed on all devices. To implement HostA to access HostB, what are the following statements about routing configuration is correct? A. At least one static route needs to be configured on MSR-1. B. At least one static route needs to be configured on the MSR-2. C. At least two static routes need to be configured on the MSR-2. D. At least one static route needs to be configured on the MSR-3. Answer: ACD

269. Configure a static route on the router. The known destination address is 192.168.1.0, and the mask is 20 bits. Interface is GigabitEthernet0/0, the outbound interface IP address is 10.10.202.1, which of the following configurations are correct? A. ip route-static 192.168.1.0 255.255.240.0 GigabitEthernet0/0 B. ip route-static 192.168.1.0 255.255.248.0 10.10.202.1 C. ip route-static 192.168.1.0 255.255.240.0 10.10.202.1 D. ip route-static 192.168.1.0 255.255.248.0 GigabitEthernet0/0 Answer: C 270. The following two static routes are configured in sequence on the router: Ip route-static 192.168.0.0 255.255.240.0 10.10.202.1 preference 100 Ip route-static 192.168.0.0 255.255.240.0 10.10.202.1 So what are the following statements about these two routes? A. The routing table will generate two routes to 192.168.0.0. The two routes are backups of each other. B. The routing table will generate two routes to 192.168.0.0, and the two routes will be load-sharing. C. The router will only generate the route configured by the second, with a priority of 0. D. The router will only generate the route configured by the second, with a priority of 60. Answer: D 271. A router connects to the carrier network through the Serial 1/0 interface. You must configure a default route on this router to access the Internet. Purpose, which of the following configurations must be correct and effective? (choose one or more) A. ip route-static 0.0.0.0 0 Serial1/0 B. ip route-static 0.0.0.0 0.0.0.0 Serial1/0 C. ip route-static 255.255.255.255 0.0.0.0 Serial1/0 D. The above configuration is not correct Answer: D 272. The customer router connects to the carrier network through the S1/0 interface. The S1/0 interface uses the default configuration. The following routes are configured on the router: [MSR]ip route-static 0.0.0.0 0.0.0.0 Serial1/0 However, by using the display ip routing-table to view the routing table, it is found that the route is not displayed in the routing table. According to this, the possible reason is. A. The configuration is incorrect. You should log out to the system view to configure the route to take effect. B. Configuration error, the next hop of the route should be entered into the IP address of the peer, not the interface name S1/0. C. S1/0 interface is shut down D. The S1/0 interface does not have an IP address. Answer: CD 273. The client needs to configure two static routes to the same destination address on the router to achieve mutual backup. Then about these two routes The correct statement of the configuration is. A. Need to configure different Preferences for the two routes. B. Need to configure different priorities for the two routes C. Need to configure different Costs for the two routes D. Need to configure different MEDs for the two routes Answer: A 274. An empty-configured MSR router connects to the local LAN user through the GE0/0 interface and directly connects to the remote router through the S1/0 interface. The IP addresses of the GE0/0 interface and the S1/0 interface are 10.1.1.1/24 and 172.16.1.1/30, respectively. In order to ensure interoperability with remote LAN users The following routes are configured on the MSR: [MSR] ip route 10.20.0.0 255.255.255.0 s1/0 After the configuration, the MSR receives the packet destined for the destination address 10.20.0.254/24. After finding the static route in the routing table, the MSR is connected. How will the packet be processed? (choose one or more) A. Discard the packet because the destination host is not listed in the routing table B. Discard the packet because the next hop address is not listed in the routing table C. Encapsulate the IP packet into a frame that conforms to the S1/0 interface link, and then forward it out from the S1/0 interface. D. Resolve the MAC address of the S1/0 interface, update the destination MAC address, and then re-encapsulate the IP packet. E. Find the IP address corresponding to interface S1/0, and then forward the IP packet from the S1/0 interface. Answer: C

275. The customer's network connection is shaped like: HostA----GE0/0--MSR-1--S1/0-----WAN-----S1/0--MSR-2--GE0/0----HostB The IP address of the interface GE0/0 of the MSR-2 is 2.2.2.1/24. The network is running normally. The hosts HostA and HostB on both sides can interact with each other. through. Now configure the following route on MSR-2: Ip route-static 2.2.2.1 24 NULL 0 Then. (choose one or more) A. HostA can still ping 2.2.2.1 B. HostA cannot ping 2.2.2.1 C. You can still ping 2.2.2.1 on MSR-1 D. Cannot ping 2.2.2.1 on MSR-1 Answer: AC 276. Xiao L is a senior network technology engineer who wants to design a perfect IGP routing protocol independently. I hope this routing protocol There are major improvements on Cost, so what are the following factors to consider when designing the cost of this routing protocol? (choose one or more) A. Link bandwidth B. Link MTU C. Link credibility D. Link delay Answer: ABCD 277. Xiao L is a senior IP network expert who is determined to develop a new dynamic routing protocol. And the working process of a routing protocol should be packaged What are the following? (choose one or more) A. Find the routing table and forward the packet B. Exchange routing information C. Calculating the route D. Maintain and update routes Answer: BCD 278. The following description of the route is correct.. (choose one or more) A. Route convergence means that the routes of routers in the entire network are consistently expressed. B. A complete route must include at least the mask, destination address, and next hop. C. The priority of the direct route cannot be manually modified. D. IGP is a routing protocol based on DV algorithm. Answer: ABC 279. A routing protocol is a link state routing protocol. Which of the following characteristics should this routing protocol have? (choose one or more) A. The routing protocol is concerned with the state of the link or interface in the network. B. The router running the routing protocol forms a weighted directed graph containing the destination network segments based on the collected link state information. C. The routing protocol algorithm can effectively prevent loops D. The routing protocol periodically sends an update message exchange routing table. Answer: ABC 280. Suppose an MSR router obtains two routes to the destination network segment 100.120.10.0/24. The cost of the two routes is 120. And 10, the priority is 10 and 150 respectively. Then the packet going to this destination address will . (choose one or more) A. Prioritize matching routes with a cost of 120 B. Prioritize matching routes with a cost of 10 C. Prioritize matching routes with priority 10 D. Prioritize matching routes with priority 150 Answer: C 281. The following routing information is found in the routing table of an MSR router: Then the description of this routing information is correct.. (choose one or more) A. Proto in this routing item may be static B. This road must have been learned through dynamic routing. C. Proto in this routing item may be rip D. This route must not be a direct route. Answer: BD

282. Which of the following statements about OSPF in the network is correct? (choose one or more) A. A router in the network may belong to multiple different areas, but one of the areas must be a backbone area. B. A router in the network may belong to multiple different areas, but these areas may not be backbone areas. C. Neighbors and adjacencies can only be established by OSPF routers in the same area. D. Routers in multiple OSPF areas in the same AS share the same LSDB Answer: BC 283. Which of the following statements is correct for RIPv1 and RIPv2 running on the MSR router? (choose one or more) A. The route destination network segment learned on the RIPv1 router must be a natural classification network segment. B. The route destination network segment learned on the RIPv2 router must be the subnet address of the variable length mask. C. Both RIPv1 and RIPv2 can learn the route of the natural classification network segment. D. Both RIPv1 and RIPv2 can learn routes of unnaturally classified network segments, such as routes with a destination network segment of 10.10.200.0/22. Answer: CD 284. Which of the following statements is correct for RIPv1 and RIPv2 running on the MSR router? (choose one or more) A. The destination network segment of the route sent by the RIPv1 router must be a natural classification network segment. B. The destination network segment of the route sent by the RIPv2 router must be the subnet address of the variable length mask. C. Both RIPv1 and RIPv2 can learn the route of the natural classification network segment. D. Both RIPv1 and RIPv2 can learn routes of unnaturally classified network segments, such as routes with a destination network segment of 10.10.200.0/22. Answer: ACD 285. The two WAN interfaces S1/0 and S1/1 of the router MSR-1 are connected to the routers MSR-2 and MSR-3 respectively. At the same time MSR-1's ether The network port is connected to the MSR-4, and all four routers run the RIP protocol. MSR-1 stands after network 192.168.0.0 fails on MSR-1 Send this update message with unreachable routes to the other three routers, if you do not consider the suppression time, then. A. Using RIP's fast convergence mechanism on MSR-1 B. Trigger update mechanism using RIP on MSR-1 C. If the MSR-1 update information about this route has not been sent yet, it receives the periodic routing update information of the neighboring router, then Wrong routing information is updated on MSR-1 D. This way of sending update messages immediately is not used alone and does not completely avoid routing loops. Answer: BCD 286. The two WAN interfaces S1/0 and S1/1 of the router MSR-1 are connected to the routers MSR-2 and MSR-3, respectively. At the same time MSR-1's ether The network port is connected to the MSR-4. All four routers run the RIP protocol and complete the routing learning correctly. They are started on all routers. RIP all loop prevention features, when the network 192.168.0.0 on the MSR-2 is found to be faulty, then. A. The Cost of the 192.168.0.0 routing entry on MSR-2 is set to the maximum value B. In the routing table on the four routers, the Cost of the 192.168.0.0 routing entry is set to the maximum value. C. The suppression time is started on the 192.168.0.0 routing entry on MSR-2. D. The suppression time is also started on the 192.168.0.0 routing entry on MSR-4. Answer: ABCD 287. The two WAN interfaces S1/0 and S1/1 of the router MSR-1 are connected to the routers MSR-2 and MSR-3 respectively. At the same time MSR-1's ether The network port is connected to the MSR-4. All four routers run the RIP protocol and complete the routing learning correctly. They are started on all routers. RIP all loop prevention features, it is found that the network 192.168.0.0 on the MSR-2 fails, then after a certain time. A. The 192.168.0.0 routing entry on all routers will enter the suppression state. B. The Cost of the 192.168.0.0 routing entry on all routers is set to the maximum value. C. If the network 192.168.0.0 returns to normal, then MSR-2 will send routing update information immediately. D. If the network 192.168.0.0 returns to normal, MSR-2 will wait until the update cycle time point to send update information to other routers. Answer: ABC 288. The customer's network consists of two MSR routers interconnected. The RIPv1 protocol runs between the two MSRs. Dynamic routing has been completed. Learning and learning the far-end routing, now customers will change RIPv1 to RIPv2, then what are the possible changes? A. The mask length of the remote route learned on the router may change. B. The way the router sends RIP packets may change. C. The interval at which RIP update packets are sent on the router changes. D. The routing entries of the routing table on the router may change. Answer: ABD

289. Router MSR-1 is interconnected with MSR-2 and MSR-3, respectively. There is a route learned from MSR-2 in the routing table of MSR-1. The RIP route of the destination network segment 120.10.12.0/24 has a Cost of 3; at this time, MSR-1 also receives a message from MSR-3. The RIP route of the network segment 120.10.12.0/24, whose cost is 15, then. A. The routing table of MSR-1 is not updated, and the network segment route learned from MSR-2 is still retained. B. MSR-1 routing table will be updated to learn from MSR-3 to Cost 15 route C. The routing table for MSR-1 is updated because a RIP route with a Cost of 15 means that the network may have loops. D. The routing table of MSR-1 will not be updated, because the RIP route with a cost of 15 means unreliable routing, RIP will not write it to its own Routing table Answer: A 290. How does RIP combine routing time and route poisoning to avoid routing loops? A. After learning the route from an interface, set the metric of the route to infinity and send it back to the neighbor router from the original interface. B. After learning the route from an interface, suppress the setting of the route and send it back to the neighbor router from the original interface. C. Proactively set the suppression time for the route of the faulty network segment, set its metric to infinity, and send it to other neighbors. D. After learning the route from an interface, set the metric of the route to infinity, set the suppression time, and then send it back to the neighbor router from the original interface. Answer: C 291. After learning the route from an interface, RIP sets the metric of the route to infinity (16) and sends it back to the neighbor router from the original interface. The way to avoid loops is A. Split Horizon B. Poison Reverse C. Route Poisoning D. Triggered Update Answer: B 292. The client router MSR-1 is configured to connect the MSR-2 to the MP through interfaces S0/0 and S0/1. The MP is now running normally. Two roads at the same time The RIP routing between the two routers is done by running RIP to learn the route of the RIP route learned on the MSR-1. (measure) value may be. A. 2M B. 4M C. 2 D. 1 Answer: CD 293. The RIP routing protocol has a timer that defines a route starting from a metric value of 16 until it is taken from the routing table. Delete the elapsed time, then A. The timer is a Timeout timer. B. The timer is Garbage-Collect timer C. This timer defaults to 120s on the MSR router. D. This timer defaults to 180s on the MSR router. Answer: BC 294. Two MSR routers are connected through the WAN and dynamically complete remote routing learning through RIPv2. At this point, the routing table has reached a stable state. State, then within 45 seconds from now on, between the two routers WAN must have the following message delivery? A. RIP Request message B. RIP Response message C. RIP Hello time message D. RIP Update message Answer: B 295. Two MSR routers MSR-1 and MSR-2 are connected through the WAN and dynamically complete remote routing learning through RIPv2. Stable 2 After a minute, I received a RIP update message from MSR-2 on MSR-1, which contains a route with a Cost of 14, then A. If the routing table of MSR-1 does not have the route, the route must be added to the MSR-1 routing table. B. If the routing table of MSR-1 originally had the route and its cost is less than 14, then the routing entry will not be updated on MSR-1. C. If the routing table of MSR-1 originally had the route, the routing entry will be updated only if its cost is greater than 14. D. If the routing table of MSR-1 originally had the same route received from the neighbor and its cost is less than 14, the route will also be updated.

296. Connect an empty MSR router to the network through GigabitEthernet0/0, GigabitEthernet0/1, and Serial1/0. Configure the IP addresses of these three interfaces as 10.1.1.1/30, 12.12.12.224/30, and 192.168.10.1/24 respectively. After configuration, these three interfaces can Interwork with the peer device directly connected to it, and then add the following configuration on the router: [MSR]rip [MSR-rip-1]network 10.0.0.0 [MSR-rip-1]network 192.168.10.0 Then the correct function of this command and the intention to describe it is A. The interface of Serial 1/0 and GigabitEthernet 0/0 on the router can send and receive RIP packets. B. The GigabitEthernet 0/1 interface on the router does not send RIP packets. C. If the Serial1/0 interface of the router does not receive the Hello packet of RIP within 90 seconds, set the RIP neighbor status to Initialization state D. RIP also advertises the routing information of the directly connected network segment 192.168.10.0/24 through the GigabitEthernet0/0 interface of the router. Answer: ABD 297. The two WAN interfaces S1/0 and S1/1 of the router MSR-1 are connected to the routers MSR-2 and MSR-3 respectively. At the same time MSR-1's ether The network port is connected to the MSR-4, and all four routers run the RIP protocol. One of the routing tables in MSR-1 is started from MSR-2 Suppressed time routing R, then. A. The cost value of route R in the routing table of MSR-1 and MSR-2 is set to 16 B. Before the end of the suppression time, if MSR-1 receives an update of route R from MSR-3 and its cost is less than 16, then MSR-1 Will suppress the suppression of route R and update the routing table C. Before the end of the suppression time, if MSR-1 receives an update of route R from MSR-2 and its cost is less than 16, then MSR-1 Will suppress the suppression of route R and update the routing table D. After the suppression time has elapsed, if MSR-1 receives an update to route R from MSR-4, MSR-1 will update the routing table. Route R information Answer: ACD 298. Three MSR routers are connected as shown, 192.168.1.0/30 is the interconnection between RTA and RTB, 10.10.10.0/30 Is the interconnection between RTB and RTC. OSPF is running on the interconnect interfaces of the three routers and belongs to Area 0. In Area 0, only three router interconnect interface segments are released. Suppose OSPF runs normally and OSPF neighbors are established successfully. A. If the link between the three routers is Ethernet, then there are at least two DRs in the network. B. If the link between the three routers is Ethernet, there may be only one DR in the network. C. After the OSPF neighbor status of the three routers is stable, the three routers have the same LSDB. D. There is no OSPF route in the RTB routing table. Answer: ACD 299. Three MSR routers are connected as shown in the figure. All three routers belong to OSPF Area 0 and pass through Area 0 at the same time.

The network command has released the interconnection segments of the three routers. On the RTC, the network segment NET-1 is also in the OSPF Area 0 via the network command. The OSPF cost between the three routers is released as shown. At present, the neighbor status of the three routers is stable, then. A. There is only one OSPF route to the NET-1 network segment in the RTA routing table. B. There are two OSPF routes to the destination network segment NET-1 in the routing table of the RTB. C. For RTB, the destination network segment NET-1 will preferentially select RTB--->RTC path D. After the network status is stable, only Hello packets are transmitted between OSPF neighbors on the network within the next 45 minutes. Answer: AB

300. Three MSR routers are connected as shown in the figure. All three routers belong to OSPF Area 0 and pass through Area 0 at the same time. The network command has released the interconnection segments of the three routers. On the RTC, the network segment NET-1 is also in the OSPF Area 0 via the network command. The OSPF cost between the three routers is released as shown. At present, the neighbor status of the three routers is stable, then. A. There is only one OSPF route to the NET-1 network segment in the RTA routing table. B. There are two OSPF routes to the destination network segment NET-1 in the routing table of the RTB. C. For RTB, the destination network segment NET-1 will prefer RTB--->RTA--->RTC path D. After the network status is stable, only Hello packets are transmitted between OSPF neighbors on the network within the next 45 minutes. Answer: AC 301. An empty configured MSR router accesses the same OSPF network through multiple interfaces. All of these interfaces start OSPF and the configuration is complete. After that, the router has successfully learned the OSPF routes in the network. Now run the following command on an OSPF interface on the router: [MSR-GigabitEthernet0/0]ospf cost 256 With the rest of the configuration unchanged, the understanding of the configuration is correct.. (choose one or more) A. This configuration may affect the forwarding path of the packet. B. This configuration does not affect the forwarding path of the packet. C. The configuration command is invalid because the command input is incorrect. D. This configuration command is invalid because the maximum value of Cost is 255. Answer: A 302. Which of the following four ways to divide an OSPF area is correct? (choose one or more)

A. Figure 1 B. Figure 2 C. Figure 3 D. Figure 4 Answer: ABCD

303. If you want to achieve network-wide interworking, what are the four ways to divide OSPF areas? (choose one or more)

A. Figure 1 B. Figure 2 C. Figure 3 D. Figure 4 Answer: ABC 304. Two MSR routers are connected via Ethernet and serial interfaces, as shown in the figure. Running the PPP link layer protocol on the serial link, two paths OSPF is running on the router and belongs to Area 0. At the same time, three network segments on each router are released through the network command in Area 0. (GE interface network segment, serial interface network segment, LAN segment); current OSPF neighbors at both ends are stable, then

A. If the OSPF Cost value is not modified, the RTA will reach the RTB LAN segment and the preferred GE link. B. As long as the OSPF Cost values of the GE interface and serial interface of the two routers are correctly modified, the RDA and RTB will be able to form the other party. Two equivalent routes for the LAN C. On the GE link, RTA and RTB will still conduct DR and BDR elections. D. The above statements are correct. Answer: ABCD

305. As shown in the figure, four MSR routers are connected through Ethernet and serial interfaces respectively, and OSPF is running on the network.

The OSPF Cost values of all interconnected links are the same except that the connection link between RTB and RTC is PPP. The links are all Ethernet. Then. A. There are at least three DRs in the network B. There are at least three BDRs in the network C. If the link between the RTD and the RTC fails, the RTD and RTC will immediately send the LSA summary information to the RTA and RTB. Will not wait for a fixed LSA update cycle D. After the state is stable, the four routers have the same LSDB. Answer: ABC 306. As shown in the figure, four MSR routers are connected through Ethernet and serial interfaces respectively, and OSPF is running on the network. The OSPF Cost values of all interconnected links are the same except that the connection link between RTB and RTC is PPP. The links are all Ethernet. Then A. If the link between the RTD and the RTC fails, the RTD and RTC will immediately send the LSA summary information to the RTA and RTB. Will not wait for a fixed LSA update cycle B. After the state is stable, the four routers have the same LSDB. C. At least three DRs in the network D. There are at least three BDRs in the network Answer: ACD 307. As shown in the figure, OSPF and RIP are running between the three MSR routers. The OSPF neighbor state between RTA and RTB is stable today.

RIPv2 between RTB and RTC is also working properly, so within 40 minutes from now on, A. There must be a packet with a multicast address of 224.0.0.13 in the network. B. There must be a packet with a multicast address of 224.0.0.5 in the network. C. RTB sent at least 10 times of its own routing table information to RTC D. RTB sent at least 1 own LSA summary information to RTA Answer: BD 308. On the MSR router, you need to view the comprehensive information of the routing table, such as the total number of routes, the number of RIP routes, the number of OSPF routes, and the activation path. By number, etc., which of the following commands can you use? A. display ip routing-table statistics B. [MSR-GigabitEthernet0/0]display ip routing-table statistics C. [MSR] display ip routing-table D. [MSR] display ip routing-table accounting Answer: AB

309. In the routing table of the router, there is an entry with a network segment of 10.168.100.0/24, with a Cost of 15 and a Preference of 100. So what are the following statements about the route? A. This route may be a manually configured static route. B. This route may be a route dynamically discovered through RIP. C. If this is a RIP route, then the route is an invalid route D. This route must have been learned through dynamic routing. Answer: BD 310. In the routing table of the router, there is an entry with a network segment of 10.168.100.0/24, with a Cost of 20 and a Preference of 255. So what are the correct statements about the route? A. This route must have been learned through dynamic routing. B. The priority of this route is the highest value, indicating any route from the untrusted source. C. Cost 20 indicates that the hop count of the route is 20 D. This is a valid dynamic route Answer: AD 311. Run the display ip routing-table command on the router. The next hop interface displayed in the routing table may be A. InLoop0 B. Null0 C. Serial 6/0/1 D. Vlan500 Answer: ABC 312. See the following in the routing table on the MSR router:

Then the correct description of the route with the destination address of 192.168.96.0/19 is A. This is a direct route with a metric of 0. B. This is a manually configured static route with a metric of 0. C. The next hop of the router, that is, the IP address of the peer device is 192.168.120.153 D. The IP address of the interface of S6/0 on this router is 192.168.120.153 Answer: AD 313. The following is displayed in the routing table on the MSR router:

Then the correct description of the route with the destination address of 192.168.96.0/24 is A. This is a direct route with a metric of 0. B. This is a manually configured static route with a metric of 0. C. The next hop of the router, that is, the IP address of the peer device is 192.168.120.153 D. The IP address of the interface of S6/0 on this router is 192.168.120.153 Answer: BC 314. Use on the MSR router The command configures a static route. A. ip route-static B. route-static C. ip static-route D. static-route Answer: A

315. The following command was executed on an MSR router: [MSR]display ip routing-table 100.1.1.1 Then the description of this command is correct. A. You can view the routing entries matching the destination address 100.1.1.1. B. You can view the routing entries matching the next hop address 100.1.1.1. C. It is possible that the output of this command is two default routes. D. This command is incorrect because no mask information is included Answer: AC 316. See the following message on an MSR router running RIP: display rip Public VPN-instance name : RIP process : 1 RIP version : 2 Preference : 100 Checkzero : Enabled Default-cost : 0 Summary : Enabled Hostroutes : Enabled Maximum number of balanced paths : 8 Then from the display information can be analyzed A. The router is running RIPv2. B. RIP's automatic aggregation function is turned on. C. The cost of the RIP route sent or received by this router is 0. D. Support 8 routes to implement load sharing Answer: ABD

317. The two empty-configured MSR routers MSR-1 and MSR-2 are interconnected back to back through their respective S1/0 interfaces, and their respective GE0/0 interfaces are divided into Do not connect client hosts HostA and HostB: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The versions of the two MSR routers are unified into Version 5.20 and Release 1618P11. The following configurations are performed on the two routers: Configuration on MSR-1: [MSR-1]interface GigabitEthernet 0/0 [MSR-1-GigabitEthernet0/0] ip address 192.168.1.1 255.255.255.0 [MSR-1]interface Serial 1/0 [MSR-1-Serial1/0] link-protocol ppp [MSR-1-Serial1/0]ip address 3.3.3.1 255.255.255.252 [MSR-1]rip [MSR-1-rip-1]network 192.168.1.0 [MSR-1-rip-1]network 3.3.3.1 Configuration on MSR-2: [MSR-2]interface GigabitEthernet 0/0 [MSR-2-GigabitEthernet0/0] ip address 10.10.10.1 255.255.255.0 [MSR-2]interface Serial 1/0 [MSR-2-Serial1/0] link-protocol ppp [MSR-2-Serial1/0]ip address 3.3.3.2 255.255.255.252 [MSR-2]rip [MSR-2-rip-1]network 10.10.10.0 [MSR-2-rip-1] network 3.3.3.1 According to the above configuration, the WAN interfaces between the two routers can communicate with each other. Both hosts HostA and HostB can ping their respective gateways. The address of GE0/0, then which of the following statements is correct? A. The two routers can learn the routes of each other's GE0/0 network segment through RIP. B. The two routers cannot learn the routes of each other's GE0/0 network segment through RIP. C. RIPv1 is running between the two routers. D. RIPv2 is running between the two routers. Answer: AC

318. Two empty MSR routers MSR-1 MSR-2 interconnect their GigabitEthernet0/0 back to back via their respective S1/0 interfaces The interfaces are connected to the client hosts HostA and HostB respectively: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB Then do the following configuration on the two routers: Configuration on MSR-1: [MSR-1]interface GigabitEthernet 0/0 [MSR-1-GigabitEthernet0/0]ip add 192.168.1.1 24 [MSR-1]interface Serial 1/0 [MSR-1-Serial1/0]ip address 30.3.3.1 30 [MSR-1]rip [MSR-1-rip-1]network 0.0.0.0 Configuration on MSR-2: [MSR-2]interface GigabitEthernet 0/0 [MSR-2-GigabitEthernet0/0] ip address 10.10.10.1 24 [MSR-2]interface Serial 1/0 [MSR-2-Serial1/0]ip address 30.3.3.2 30 [MSR-2]rip [MSR-2-rip-1]network 10.10.10.0 [MSR-2-rip-1]network 30.3.3.1 According to the above configuration, the WAN interfaces between the two routers can communicate with each other. The other physical links on the network are good. The two hosts HostA and HostB. You can ping the address of the corresponding gateway GigabitEthernet0/0, so the following statement is correct. A. The command network 0.0.0.0 on MSR-1 is incorrectly configured. You should configure a specific network segment. B. There is no RIP route in the routing table of MSR-2 C. The command network 30.3.3.1 on MSR-2 is incorrectly configured and should be network 30.3.3.2 D. All three of the above are wrong, the two routers can learn RIP routing Answer: D 319. The route value of the route destined for the destination network segment 61.232.200.253/22 is found in the routing table of an MSR 30 router. So the description of this routing entry is correct. (choose one or more) A. If the route is learned through the RIP protocol, the route may be in a suppressed state. B. The route may be a static route C. If the route is learned through the RIP protocol, it is possible that the network 61.232.200.253/22 has failed. D. The route can only be a dynamic route Answer: ACD 320. The MSR router exchanges routing information with the outside world through RIPv2. There are 10.1.1.0/24, 10.1.2.0/24, 10.1.3.0/24 in the routing table. Three routes, then add the following RIP configuration on the router: [MSR-rip-1] summary Then, which router will send the following route to the network segment? A. 10.1.0.0/16 B. 10.1.2.0/22 C. 10.0.0.0/8 D. 10.1.0.0/22 Answer: C 321. The two routers MSR-1 and MSR-2 complete the dynamic learning of routes through RIP. The following debugging information is displayed on MSR-1: *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: RIP 1 : Sending v2 request on Serial 0/0 from 3.3.3.3 *Nov 26 02:20:25:353 2008 H3C RM/6/RMDEBUG: RIP 1 :Sending request on interface Serial0/0 from 3.3.3.3 to 224.0.0.9 *Nov 26 02:20:25:400 2008 H3C RM/6/RMDEBUG: RIP 1 : Receiving v2 request on Serial0/0 from 3.3.3.1 According to the debug information, you can guess. (choose one or more) A. There is no RIP routing information from MSR-2 in the MSR-1 routing table. B. It is possible that the RIP of the two routers has just started. C. At this point, there is already RIP routing information from MSR-2 in the MSR-1 routing table. D. The RIP version between the two routers is inconsistent Answer: AB

322. An MSR router needs to learn routing information through RIP. The following configuration is done on the router: Rip 1 Network 0.0.0.0 Then the correct explanation for this configuration is A. RIP will release the default route for 0.0.0.0 B. Enable RIP on all interfaces on the router. C. When RIP is not enabled on this router D. This configuration is misconfigured Answer: B 323. Two empty configured routers MSR-1 and MSR-2 are connected as follows: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The WAN segment of the two routers is 192.168.10.0/30, and the GE0/0 address of MSR-1 is 172.16.1.1/24. After configuration, HostA can ping 172.16.1.1. The WAN between the two routers is also interoperable. Now add the following configuration on the MSR-1 [MSR-1]rip [MSR-1-rip-1]network 192.168.10.1 [MSR-1-rip-1]network 172.16.1.1 And the RIP process is started on MSR-2. Which of the following configurations is required on the MSR-2 to ensure that MSR-2 learns RIP routing? (choose one or more) A. [MSR-2-rip-1]network 192.168.10.1 B. [MSR-2-rip-1]network 0.0.0.0 C. [MSR-2-rip-1]network *.*.*.*, where *.*.*.* is any IP address D. [MSR-2-rip-1]network *.*.*.*, where *.*.*.* is any IP address on MSR-2 Answer: AB 324. The WAN link between the two routers MSR-1 and MSR-2 adopts PPP protocol. Both ends learn each other through RIP. Routing, the current routing learning is normal, now add the following command in the RIP configuration of MSR-1: [MSR-1-rip-1] silent-interface all Then. (choose one or more) A. This command causes all interfaces of MSR-1 to receive only routing updates without sending routing updates. B. This command causes all interfaces of MSR-1 to only send routing updates without accepting routing updates. C. After configuring this command, the RIP route in the MSR-2 routing table disappears immediately D. After configuring this command, the RIP route in the MSR-1 routing table disappears immediately. Answer: A 325. The WAN link between the two routers MSR-1 and MSR-2 in the customer network adopts PPP protocol, and both ends are configured with RIP. Learn from each other's routes. Currently, the route learning is normal. Now add the following command to the RIP configuration of MSR-1: [MSR-1-rip-1] silent-interface all Then. (choose one or more) A. This command causes all interfaces of MSR-1 to receive only routing updates without sending routing updates. B. This command causes all interfaces of MSR-1 to only send routing updates without accepting routing updates. C. After 10 minutes of configuring this command, the RIP route in the MSR-2 routing table disappears. D. After 10 minutes of configuring this command, the RIP route in the MSR-1 routing table disappears. Answer: AC 326. The WAN link between the two routers MSR-1 and MSR-2 adopts the PPP protocol, and the two routers are configured with RIP to release routes to each other. By information. Currently, the RIP route advertised by MSR-2 can be seen on MSR-1, but no RIP route is visible in the routing table of MSR-2. The possible reason is. (choose one or more) A. MSR-1 only starts RIP on the WAN interface, and does not start RIP on other interfaces. B. The RIP versions of the two routers are inconsistent C. MSR-1 RIP is configured with silent-interface all D. MSR-2 RIP is configured with silent-interface all Answer: ABC

327. The two routers MSR-1 and MSR-2 are interconnected through the S0/0 interface, and the two routers learn from each other by running the RIP protocol. Routing of the LAN segment. See the following configuration command on MSR-1: [MSR-1-Serial0/0] rip authentication-mode md5 rfc2453 H3C Then the correct explanation for this order is. (choose one or more) A. Configure RIP to use MD5 plain text verification B. Configure RIP to use MD5 cipher text verification C. Specify MD5 verification to use the message format specified in RFC2453 D. Specify MD5 authentication to use H3C private extended protocol packet format Answer: BC

328. Multiple WAN protocols and routing protocols are required in a large financial network. In order to enhance network security, it is hoped that the selected protocol has authentication encryption and connection. Security measures such as control. So which of the following protocols might meet the requirements when choosing a WAN protocol and routing protocol? (choose one or more) A. PPP B. HDLC C. RIPv2 D. RIPv1 Answer: AC 329. The following routing information is seen on the MSR router running RIP: display ip routing-table 6.6.6.6 Routing Table : Public Summary Count : 2

At this point, the router receives a packet with a destination address of 6.6.6.6, then. A. The packet will match the RIP route in the routing table first because it has the shortest mask B. The packet will match the static route in the routing table with priority because of its high priority. C. The packet will match the static route in the routing table first because it has the smallest metric D. The packet will match the static route in the routing table first because it has the longest mask Answer: D 330. A network administrator has configured RIP on a router: Rip 1 Version 2 Network 100.0.0.0 Network 8.0.0.0 However, it is found that the RIP route of the peer cannot be learned. The administrator needs to open the RIP debugging information on the router. Which of the following configurations can be used? View RIP debugging information on the device? A. debugging rip packet B. [MSR] debugging rip packet C. debugging rip 1 packet D. debugging rip 2 Answer: C 331. Two MSR routers are interconnected through their respective WAN interfaces S1/0, while running RIPv2 on both routers to complete dynamically Routing to each other remotely, for security reasons, to add authentication to RIP, what are the correct RIP configurations? A. [MSR-serial1/0]rip authentication-mode simple 123 B. [MSR]rip authentication-mode simple 123 C. [MSR-rip-1] rip authentication-mode simple 123 D. [MSR-rip-2]rip authentication-mode simple 123 Answer: A

332. The two MSR routers are directly connected back to back via Serial1/0, and the following configuration is seen on one MSR router: Interface Serial1/0 Ip address 8.8.8.2 255.255.255.0 # Interface GigabitEthernet0/0 Port link-mode route Ip address 100.1.1.2 255.255.255.0 # Rip 1 Version 2 Network 0.0.0.0 # Ip route-static 0.0.0.0 0.0.0.0 8.8.8.1 Assuming that both routers are properly configured with RIP and all interfaces are UP, which of the following analysis is correct for this configuration? A. A RIP default route will be sent from the outbound interface Serial1/0 to the peer neighbor. B. The peer neighbor router can only receive one RIP route. C. The peer neighbor router cannot learn the default route generated by RIP from this router. D. Update packets of RIP routes can only be sent or received from the Serial1/0 interface of the router. Answer: BC 333. Two MSR routers are directly connected through their respective GigabitEthernet 0/0 interfaces, and the following configuration is seen on one MSR router. Interface LoopBack2 Ip address 8.8.8.8 255.255.255.255 # Interface GigabitEthernet0/0 Port link-mode route Ip address 100.1.1.2 255.255.255.0 # Rip 1 Undo summary Version 2 Network 100.0.0.0 Network 8.0.0.0 Assuming that both ends of the router are properly configured with RIP, according to this configuration, which of the following analysis is correct? A. The peer router will learn the RIP route of 8.8.8.8/32. B. The peer router will learn the RIP routing of 8.0.0.0/8. C. Turning off aggregation means sending different subnets in the natural network segment as a natural mask route D. Turning off aggregation means that the subnet mask information of the natural network can be passed through RIP Answer: AD 334. The two null-configured MSR routers are connected back-to-back through their respective WAN Serial 1/0 interfaces, with an interconnection network segment of 192.0.0.0/24. At the same time, the two routers connect their respective LAN segment users through their respective GigabitEthernet0/0: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB Configure RIPv1 on both routers. Now RIP routes of the peer LAN segment have been learned on both routers. So which of the following statements are positive? A. If the LAN segment of one of the routers is 10.0.0.0/24, the routing table of the other router will learn the route of 10.0.0.0/8. B. The way to exchange RIP packets between two routers is broadcast. C. The RIP message between the two routers is still based on UDP transmission. D. RIP RADIUS authentication can be configured on the WAN interfaces of the two routers to enhance network security. Answer: ABC 335. The two empty-configured MSR routers are connected back-to-back through their respective WAN Serial1/0 interfaces, with an interconnection network segment of 192.0.0.0/24. At the same time, the two routers connect their respective LAN segment users through their respective GigabitEthernet0/0: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB RIPv1 is configured on the two routers. Now, the RIP routes of the peer LAN segment are learned on both routers. So which of the following statements are positive? A. If the LAN segment of one of the routers is 10.0.0.0/24, the routing table of the other router will learn the route of 10.0.0.0/8. B. The way to exchange RIP packets between two routers is multicast. C. RIP packets between two routers are based on TCP transmission D. CHAP authentication can be configured on the WAN interfaces of the two routers to enhance network security. Answer: AD

336. The two routers MSR-1 and MSR-2 are interconnected through GigabitEthernet0/0, and RIPv2 is running between the two routers. The GigabitEthernet0/0 interface of one of the routers MSR-1 wants to send only RIP packets without accepting RIP packets. Which implementations are feasible? A. Configure silent-interface GigabitEthernet 0/0 on GigabitEthernet 0/0 of MSR-1. B. Configure silent-interface GigabitEthernet 0/0 on GigabitEthernet 0/0 of MSR-2. C. Configure an ACL on MSR-1 and apply it to the inbound direction of its GigabitEthernet0/0 interface. D. Configure an ACL on the MSR-2 and apply it to the inbound direction of its GigabitEthernet0/0 interface. Answer: BC 337. The two routers MSR-1 and MSR-2 are interconnected through GigabitEthernet0/0, and RIPv2 is running between the two routers. The GigabitEthernet0/0 interface of one of the routers MSR-1 wants to send only RIP packets without accepting RIP packets. Which implementations are feasible? A. Configure the silent-interface GigabitEthernet 0/0 on GigabitEthernet 0/0 of MSR-2. B. Configure silent-interface GigabitEthernet 0/0 on GigabitEthernet 0/0 of MSR-1. C. Configure an ACL on the MSR-2 and apply it to the inbound direction of its GigabitEthernet0/0 interface. D. Configure an ACL on MSR-1 and apply it to the inbound direction of its GigabitEthernet0/0 interface. Answer: AD 338. Routers MSR-1 and MSR-2 are interconnected through their respective GigabitEthernet0/0, and RIP is running between the two routers. RIP has correctly completed remote routing learning. Now you can see the following routing information in the routing table of MSR-1:

Then according to this information can be speculated A. It can be confirmed that RIPv2 is running between the two routers. B. It can be confirmed that the operation between the two routers is RIPv1. C. The route of the first entry with the network segment of 2.0.0.0/24 is still a valid route. D. The route of the first entry whose network segment is 2.0.0.0/24 has reached the maximum value and is an invalid route. Answer: AC 339. Two MSR routers are connected as shown. OSPF is currently running between two routers. Now you need to configure an ACL on the RTA to block To establish an OSPF neighbor relationship between the RTA and the RTB, apply the following ACLs to the outbound direction of the GE0/0 interface of the RTA. feasible?

A. Acl number 3000 Rule 0 deny ip destination 224.0.0.5 0 Rule 5 permit ip B. Acl number 3000 Rule 0 deny ip destination 224.0.0.5 0 eq 89 Rule 5 permit ip C. Acl number 3000 Rule 0 deny udp destination-port eq 89 Rule 5 permit ip D. Acl number 3000 Rule 0 deny ospf Rule 5 permit ip Answer: AD

340. Two empty MSR routers are connected back to back through their respective GE0/0 interfaces. The interconnection network segment is 192.168.1.0/30, which is correctly configured. After the IP address, the GE0/0 interfaces of the two routers can communicate with each other. Now add the following OSPF configuration on each of the two routers: Ospf 1 Area 0.0.0.1 Network 192.168.1.0 0.0.0.3 So which of the following statements are correct? (choose one or more) A. The router ID is not configured. A stable OSPF adjacency relationship cannot be established between the two routers. B. Area 0 is not configured. A stable OSPF adjacency cannot be established between the two routers. C. An OSPF route appears in the routing table of the RTA. D. A stable OSPF adjacency can be established between two routers, but there is no OSPF route in the routing tables of RTA and RTB. Answer: D 341. Two empty configured MSR routers MSR-1 and MSR-2 are directly connected through their respective GE0/0 interfaces, and the interfaces of MSR-1 and MSR-2 The IP addresses on GE0/0 are 10.1.1.1/24 and 10.1.1.2/24, respectively, and IP reachability between the two GE0/0 interfaces. Then on two routers The following OSPF configurations have been added to the above: MSR-1: [MSR-1-ospf-1] area 0.0.0.255 [MSR-1-ospf-1-area-0.0.0.255] network 10.1.1.0 0.0.0.255 MSR-2: [MSR-2-ospf-1] area 255 [MSR-2-ospf-1-area-0.0.0.255] network 10.1.1.0 0.255.255.255 Then the correct description about the above configuration is. (choose one or more) A. The command on the MSR-1 network 10.1.1.0 0.0.0.255 means to enable OSPF on the GE0/0 interface of the router and join the corresponding area. B. The command on the MSR-2 network 10.1.1.0 0.255.255.255 cannot start OSPF on the GE0/0 interface of the router. C. The OSPF interfaces of both routers belong to the OSPF area 255. D. The OSPF interfaces of the two routers do not belong to the same OSPF area. The OSPF area of one router is incorrectly configured. Answer: AC 342. Three MSR routers are connected in the same LAN network as shown. Run OSPF on the LAN interconnect segment of the three routers. The DR priorities of RTA, RTB, and RTC are 2, 2, and 3, respectively. Due to the LAN link failure of RTC, only RTA and RTB are currently in positive It works often, and the OSPF neighbor status between RTA and RTB is stable. Then

A. After the RTC link is restored, the DR will be reselected in the network and the RTC will become the new DR. B. After the link of the RTC is restored, three OSPF adjacencies will be established in the network. C. After the link of the RTC is restored, two OSPF adjacencies will be established in the network. D. After the RTC link is restored, the OSPF adjacency status of RTC and RTB is FULL. Answer: BD

343. Two MSR routers implement dynamic routing learning through OSPF. On one of the routers MSR-1, there are three interface IP addresses. For 192.168.8.1/24, 192.168.13.254/24 and 192.168.29.128/24, then use a network command on these three interfaces. Which OSPF is enabled, which of the following configurations is possible? (choose one or more) A. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.255.255 B. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.32.255 C. [MSR-1] ospf [MSR-1-ospf-1] area 0 [MSR-1-ospf-1-area-0.0.0.0] network 192.168.1.0 0.0.63.255 Answer: AC 344. The following configuration is performed on the GE0/0 interface of an MSR router running OSPF: [MSR-GigabitEthernet0/0]ospf cost 2 So the correct description about this configuration command is. (choose one or more) A. Change the OSPF Cost value of interface GE0/0 to 2 B. This command only affects the path of data received from this interface. C. This command only affects the path of data sent from this interface. D. By default, the interface Cost of the MSR router is proportional to the interface bandwidth. Answer: AC 345. The two null-configured MSR routers MSR-1 and MSR-2 are interconnected by their respective GE0/0, and their IP addresses are 192.168.1.2/30 respectively. And 192.168.1.1/30. Then add the following configuration on both routers: [MSR-ospf-1]area 0 [MSR-ospf-1-area-0.0.0.0]network 192.168.1.1 0.0.0.3 The OSPF router IDs of the two routers are their respective GE0/0 interface addresses. There is no other configuration on the two routers. To ensure that MSR-1 becomes OSPF DR in the next election, which configuration do you need to add? (choose one or more) A. Configure on MSR-1: [MSR-1-GigabitEthernet0/0]ospf dr-priority 255 B. Configure on MSR-2: [MSR-2-GigabitEthernet0/0]ospf dr-priority 0 C. Configure on MSR-1: [MSR-1-ospf-1]ospf dr-priority 255 D. Configure on MSR-2: [MSR-1-ospf-1]ospf dr-priority 0 Answer: AB 346. A network connection is shown. All of the four routers are configured with OSPF and are running in OSPF area 23. All network segments can be connected to each other. The OSPF cost of the interconnect link between routers is shown in the figure. Then the following description is correct (choose one or more)

A. RTD has the same LSDB as RTA B. RTC calculates the best path to the 192.168.2.0/24 network segment according to the SPF algorithm as C->A->B C. After SPF calculation, the RTC reaches 192.168.4.0/24 and the path to the 192.168.2.0/24 has the same Cost value, so it will be on the RTC. Equivalent routing D. RTC will have two OSPF neighbors Answer: AB

347. The following statement about OSPF information display and debugging commands is correct.. (choose one or more) A. You can view the OSPF neighbor relationship of the router by using the display ospf peer command. B. Use the display ospf lsdb command to view the link state database of the router and the link state database of all OSPF routers in the network. Should be the same C. You can view the OSPF routes of the router by using the display ospf routing command. Not all OSPF routes are added. Global routing table D. Display OSPF error information by using display ospf fault Answer: AC 348. NAPT mainly for data packets Information conversion? (choose one or more) A. Data link layer B. Network layer C. Transport layer D. Application layer Answer: BC 349. After configuring NAPT, it is found that some intranet addresses can always be pinged to the external network, and some are not always available. Possible reasons are A. The ACL settings are incorrect B. NAT address pool has only one address C. NAT device performance is insufficient D. NAT configuration does not take effect Answer: A 350. In the following statement about Easy IP, the mistake is. (choose one or more) A. Easy IP is a special case of NAPT B. You do not need to configure an ACL to match packets that need to be translated by NAT. C. You do not need to configure a NAT address pool when configuring Easy IP. D. Easy IP is suitable for occasions where the NAT device dials or dynamically obtains the public IP address. Answer: B 351. In the following statement about Easy IP, the correct one is. (choose one or more) A. Easy IP is a special case of NAPT B. You do not need to configure an ACL to match packets that need to be translated by NAT. C. You do not need to configure a NAT address pool when configuring Easy IP. D. Easy IP is suitable for occasions where the NAT device dials or dynamically obtains the public IP address. Answer: ACD 352. If the public network address of the NAT device is dynamically allocated by the operator through ADSL, in this case, it can be used. A. Static NAT B. NAPT using address pool C. Basic NAT D. Easy IP Answer: D 353. An MSR router is connected to the Internet through the S1/0 interface, and the GE0/0 interface is connected to the LAN host. The network segment where the LAN host resides is 10.0.0.0/8, there is an FTP server with IP address 202.102.2.1 on the Internet. By configuring IP addresses and routes on the router Currently, hosts on the LAN can access the Internet (including the public FTP server). Now add the following configuration on the router: firewall Enable Acl number 3000 Rule 0 deny tcp source 10.1.1.1 0 source-port eq ftp destination 202.102.2.1 0 Then apply this ACL to the inbound and outbound directions of the GE0/0 interface. Which of the following intents can this ACL implement? A. Prohibit a host with source address 10.1.1.1 from initiating an FTP connection to destination host 202.102.2.1 B. Only the host with the source address 10.1.1.1 to the destination host 202.102.2.1 is blocked for the FTP control connection of TCP 21 C. Only prohibit the host from the source address 10.1.1.1 to the destination host 202.102.2.1 as the TCP 20 FTP data connection D. There is no restriction on the FTP connection initiated from 10.1.1.1 to 202.102.2.1 Answer: D

354. See the following message on the router MSR-1: [MSR-1]display acl 3000 Advanced ACL 3000, named -none-, 2 rules, ACL's step is 5 Rule 0 permit ip source 192.168.1.0 0.0.0.255 Rule 10 deny ip (19 times matched) The ACL 3000 has been applied to the correct interface and direction. According to this. (choose one or more) A. This is a basic ACL B. There is a packet flow matching the rule rule 10 C. When viewing this information, no packets from the 192.168.1.0/24 network segment match the ACL. D. The packet matching rule 10 may be destined for the destination network segment 192.168.1.0/24. Answer: BCD 355. A network connection is like: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB Two MSRs, MSR-1 and MSR-2, are connected back to back through their respective S1/0 interfaces, and their GE0/0 interfaces are respectively connected to the client. Hosts HostA and HostB. The IP address of HostA is 192.168.0.2/24, and the address of S0/0 of MSR-2 is 1.1.1.2/30. Configure other related IP addresses and routes. HostA can communicate with HostB on the current network. Today's customer request does not allow HostA to pass Address 1.1.1.2 Telnet Login to MSR-2. So which of the following configurations can meet this need? A. Configure the following ACL on MSR-1 and apply it to the inbound direction of GE0/0 of MSR-1: [MSR-1]firewall enable [MSR-1]acl number 3000 [MSR-1-acl-adv-3000]rule 0 deny tcp source 192.168.0.1 0.0.0.255 destination 1.1.1.2 0.0.0.3 destinationPort eq telnet B. Configure the following ACL on MSR-1 and apply it to the outbound direction of GE0/0 of MSR-1: [MSR-1]firewall enable [MSR-1]acl number 3000 [MSR-1-acl-adv-3000]rule 0 deny tcp source 192.168.0.2 0 destination 1.1.1.2 0 destination-port eq telnet C. Configure the following ACL on MSR-1 and apply it to the inbound side of S1/0 of MSR-1 To: [MSR-1]firewall enable [MSR-1]acl number 3000 [MSR-1-acl-adv-3000]rule 0 deny tcp source 192.168.0.1 0.0.0.255 destination 1.1.1.2 0 destination-port eq Telnet D. Configure the following ACL on MSR-1 and apply it to the outbound direction of S1/0 of MSR-1: [MSR-1]firewall enable [MSR-1]acl number 3000 [MSR-1-acl-adv-3000]rule 0 deny tcp source 192.168.0.2 0 destination 1.1.1.2 0.0.0.3 destination-port eq Telnet Answer: AD 56. A network connection is like: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The two MSR routers MSR1 and MSR2 are interconnected through their respective S1/0 interfaces, and their respective GigabitEthernet0/0 interfaces are respectively connected. Connect the client hosts HostA and HostB. By configuring IP addresses and routes, HostA on the current network can communicate with HostB. Now the following match has been added to the MSR-2. Set: firewall enable Acl number 3000 Rule 0 deny tcp destination-port eq telnet Interface Serial1/0 Link-protocol ppp Ip address 1.1.1.2 255.255.255.252 Firewall packet-filter 3000 inbound Firewall packet-filter 3000 outbound Interface GigabitEthernet0/0 Ip address 10.1.1.1 255.255.255.0 So which of the following statements are correct? A. After the firewall packet-filter 3000 outbound is configured, the firewall packet-filter 3000 inbound command is replaced. B. Unable to successfully Telnet to MSR-1 on HostB C. You can successfully Telnet to MSR-1 on HostB D. The last configured firewall packet-filter 3000 outbound will not replace the firewall packet-filter 3000 inbound command. Answer: BD

357. A network connection is like: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB Two MSRs, MSR-1 and MSR-2, are interconnected back to back through their respective S1/0 interfaces, and their GE0/0 interfaces are connected to customers respectively. End hosts HostA and HostB. HostA can communicate with HostB on the network. HostA's IP The address is 192.168.0.2/24 and the default gateway is 192.168.0.1. The GE0/0 interface address of MSR-1 is 192.168.0.1/24. At MSR-1 The following configuration has been added: Firewall enable firewall Default permit acl Number 3003 Rule 0 deny icmp source 192.168.0.2 0 icmp-type echo-reply Interface GigabitEthernet0/0 Firewall packet-filter 3003 inbound Then. A. The IP address of the interface GE0/0 of MSR-1 cannot be pinged on HostA. B. You can ping the IP address of GE0/0 of MSR-1 on HostA. C. Cannot ping HostA on MSR-1 D. You can ping HostA on MSR-1 Answer: BC 358. The following ACL is configured on a router: Acl number 2000 match-order auto Rule 0 deny Rule 5 permit source 192.168.9.0 0.0.7.255 Assuming the ACL is applied to the correct interface and in the right direction, then . (choose one or more) A. The data stream sent from the source network segment to 192.168.15.0/24 is allowed to pass. B. The data stream sent from the source network segment to 192.168.9.0/21 is allowed to pass. C. The data stream sent from the source network segment to 192.168.9.0/21 is forbidden to pass. D. The data stream sent from the source network segment to 192.168.9.0/22 is forbidden to pass. E. The data stream sent by any source network segment is forbidden to pass Answer: AB 359. A customer's MSR route connects to the Internet through the WAN interface S1/0, and connects to the office network through the LAN interface GE0/0. The former office network user can access the Internet normally. Add the following ACL configuration on the router: Firewall enable Firewall default deny # Acl number 3003 Rule 0 deny icmp Rule 5 permit tcp destination-port eq 20 # Interface GigabitEthernet0/0 Firewall packet-filter 3000 inbound Firewall packet-filter 3000 outbound Then. (choose one or more) A. ICMP packets originating from the Internet to the Internet are prohibited by the router. B. FTP traffic to the router initiated by the user of the office network can pass normally. C. The Telnet packet from the user of the office network that reaches the router GE0/0 can pass normally. D. FTP traffic to the Internet initiated by the user of the office network is allowed to pass through the router, and all other packets are prohibited from passing through the router. Answer: A

360. The customer's router MSR-1 is connected to a Layer 3 switch under the GE0/0 interface, and this Layer 3 switch is the customer's office network to which it is connected. The default gateway for multiple network segments is located. MSR-1 is connected to the Internet through serial port S1/0. The entire network has been interoperable normally. Office network users can access it. Internet. Add the following ACL configuration on the router: Firewall enable Acl number 3004 Rule 0 deny ip source 192.168.1.0 0.0.0.255 Rule 5 permit tcp source 192.168.0.0 0.0.255.255 Rule 10 permit icmp Apply ACL 3004 to the inbound direction of GE0/0, then. (choose one or more) A. The router allows users of the 192.168.2.0/24 network segment to pass FTP data streams to the Internet. B. The router allows all users to pass ICMP messages. C. The router prohibits all IP traffic of the Internet on the 192.168.1.0/24 network segment. D. The router allows users of the 192.168.1.0/24 network segment to pass WWW traffic to the Internet. Answer: AC 361. A three-layer switch is connected to the GigabitEthernet0/0 interface of the customer's router MSR-1, and this three-layer switch is for the customer. The default gateway for multiple network segments of the public network. At the same time, the router's WAN interface is connected to the Internet, and there is a DNS server on the Internet. Serving the host in the customer's local area network, the customer's office network can access the Internet normally, now in MSR-1 The following ACL is applied to the inbound direction of GigabitEthernet 0/0: Firewall enable Acl number 3006 Rule 0 deny tcp source 192.168.1.0 0.0.0.255 Rule 5 permit ip Then. (choose one or more) A. Customers on the 192.168.1.0/24 network segment can send and receive external mail normally through mail clients such as Outlook. B. Customers on the 192.168.1.0/24 network segment cannot open external web pages by WWW C. Customers on the 192.168.0.0/24 network segment can download data from the Internet via FTP. D. Customers on the 192.168.1.0/24 network segment cannot send and receive external mail through mail clients such as Outlook. Answer: BCD 362. The customer's network structure is shown in the figure. To achieve the following requirements:

1. Host C and Host B exchange visits 2. Host B and Host A cannot exchange visits 3. Host A and Host C cannot interact with each other A. Applying an advanced ACL only on GE0/0 of MSR-1 can fulfill this requirement. B. Applying an ACL only on GE0/0 of MSR-1 cannot fulfill this requirement. C. Applying advanced ACLs on GE0/0 of the two routers can achieve this requirement. D. Applying advanced ACLs on interfaces S1/0 and GE0/0 of MSR-1 can implement this requirement. Answer: ACD

363. See the following message on the router MSR-1: [MSR-1]display firewall-statistics all Firewall is enable, default filtering method is 'permit'. Interface: GigabitEthernet0/0 In-bound Policy: acl 3000 Fragments matched normally From 2008-11-08 2:25:13 to 2008-11-08 2:25:46 0 packets, 0 bytes, 0% permitted, 4 packets, 240 bytes, 37% denied, 7 packets, 847 bytes, 63% permitted default, 0 packets, 0 bytes, 0% denied default, Totally 7 packets, 847 bytes, 63% permitted, Totally 4 packets, 240 bytes, 37% denied. According to this, we can speculate A. From the 37% denied in the above information, it can be seen that there is already data matching the rules in ACL 3000. B. Some of the packets do not match the rules in ACL 3000, but match the default permit rule. C. ACL 3000 is applied in the inbound direction of GigabitEthernet0/0 D. 0% denied default in the above information means that the default matching rule for this ACL is deny Answer: ABC 364. The Ethernet port Ethernet1/0 of the customer router MSR-1 is configured as follows: Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 The interface is connected to a Layer 3 switch, and the Layer 3 switch is the default for the network segment 192.168.7.0/24 to 192.168.83.0/24 of the customer office network. The gateway is located. Now the customer requires an ACL on MSR-1 to prevent all users on the office network from initiating the address 192.168.0.1 of MSR-1. Telnet, then which of the following configurations is correct? A. Acl number 3000 Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 Firewall packet-filter 3000 inbound B. Acl number 3000 Rule 0 deny 0.0.0.0 255.255.255.255 destination 192.168.0.1 0 destination-port eq telnet Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 Firewall packet-filter 3000 outbound C. Acl number 3000 Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 Firewall packet-filter 3000 inbound D. Acl number 3000 Rule 0 deny 255.255.255.255 0 destination 192.168.0.1 0 destination-port eq telnet Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 Firewall packet-filter 3000 outbound Answer: A

365. The Ethernet port Ethernet0/0 of the router MSR-1 is configured as follows: Interface Ethernet0/0 Ip address 192.168.0.1 255.255.255.0 A Layer 3 switch is connected to the interface, and the Layer 3 switch is the default gateway of multiple network segments of the customer's office network. Therefore, the customer is now required to configure an ACL on the interface Ethernet0/0 of MSR-1 (without restricting the direction of the application) to prohibit all users of the office network. Ping 192.168.0.1, which configuration can be used? A. acl number 3000 Rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo-reply B. acl number 3000 Rule 0 deny icmp destination 192.168.0.1 0 icmp-type echo C. acl number 3000 Rule 0 deny icmp destination 192.168.0.1 0 D. acl number 3000 Rule 0 deny ip destination 192.168.0.1 0 eq icmp Answer: BC 366. A network connection is as follows: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The customer request only limits the ICMP message between HostA and HostB. Which of the following is feasible? A. Configure an ACL on the MSR-1. Disable the ICMP packet from the source host HostA to the destination host HostB and apply the ACL to the MSR-1. Outbound direction of GE0/0 B. Configure an ACL on the MSR-1 to disable ICMP packets from the source host HostA to the destination host HostB. Apply the ACL to the MSR-1. Outbound direction of S1/0 C. Configure an ACL on the MSR-1 to disable ICMP packets from the source host HostB to the destination host HostA. Apply the ACL to the MSR-1. Outbound direction of S1/0 D. Configure an ACL on the MSR-1. Disable the ICMP packet from the source host HostB to the destination host HostA and apply the ACL to the MSR-1. Outbound direction of GE0/0 Answer: BD 367. The two MSRs, MSR-1 and MSR-2, are interconnected through their respective S1/0 interfaces, and their respective GigabitEthernet0/0 interfaces are divided into Do not connect client hosts HostA and HostB: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB By configuring the IP address and route, HostA can communicate with HostB on the current network. Now it is added to the router MSR-1 as follows. ACL Configuration: Firewall enable Acl number 3000 Rule 0 deny icmp icmp-type echo Interface GigabitEthernet0/0 Ip address 192.168.0.1 255.255.255.0 Firewall packet-filter 3000 inbound So what are the following statements that are correct? A. The ping will not pass its own gateway address on HostA, that is, the interface address of GE0/0 on MSR-1. B. Ping HostB on HostA C. Can ping HostA on HostB D. Can ping HostB on MSR-1 Answer: ABCD

368. The GE0/0 interface address of the router MSR-1 is 192.168.100.1/24, and the interface is connected to a Layer 3 switch, and the Layer 3 switch The default gateway for multiple network segments of the customer's office network. MSR-1 is connected to the Internet through serial port S1/0. The entire network has been interoperable normally. Office users can access the Internet. For security reasons, it is necessary to prohibit the client host from pinging the GE0/0 interface of MSR-1, so it is on the road. The following ACLs are configured on the device: Acl number 3008 Rule 0 deny icmp source 192.168.1.0 0.0.0.255 At the same time, the ACL is applied in the inbound direction of GE0/0. Users on the 192.168.0.0/24 network segment in the LAN can still be pinged. through GE0/0 interface address. According to the above information, you can speculate . (choose one or more) A. The ACL does not take effect B. The ACL is applied in the wrong direction. C. Firewall default rules are allowed D. After the shutdown and undo shutdown commands are executed on the interface GE0/0, the ping of the 192.168.0.0/24 network segment cannot be achieved. Ethernet interface address Answer: C 369. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The network has been properly configured with IP addresses and routes. Currently, HostA on the network can communicate with HostB. For some security reasons, customers HostB is not required to ping HostA, but HostA can ping HostB and other packets between HostA and HostB. There are no restrictions on the delivery, so which of the following statements are correct? (choose one or more) A. Configuring an ACL on MSR-1 only does not fulfill this requirement B. Configuring an ACL on MSR-2 only does not fulfill this requirement C. This can be achieved by configuring the ACL only on MSR-1. D. This can be achieved by configuring the ACL only on MSR-2. E. When the ping command is used, the ICMP packets between the two hosts are bidirectional. The requirements for this single interworking cannot be implemented. Answer: CD 370. See the following message on a router MSR-1: [MSR-1]display arp all Type: S-Static D-Dynamic IP Address MAC Address VLAN ID Interface Aging Type 192.168.0.2 0123-4321-1234 N/A GE0/0 20 D After checking that the host has a large number of viruses, the client must now prohibit the packets sent by the host from passing through the MSR-1.. (choose one or more A. You can configure a basic ACL on the router and apply it to the inbound direction of GE0/0. B. You can configure a basic ACL on the router and apply it in the outbound direction of GE0/0. C. You can configure an advanced ACL on the router and apply it to the inbound direction of GE0/0. D. You can configure an advanced ACL on the router and apply it in the outbound direction of GE0/0. Answer: AC

371. The customer's network is as follows: HostA----GE0/0--MSR-1--S1/0---------S1/0--MSR-2--GE0/0----HostB The WAN interfaces on the two routers are configured as follows: MSR-1: Firewall enable Acl number 3000 Rule 0 deny ip source 192.168.0.0 0.0.0.255 Rule 5 permit ip Interface Serial1/0 Link-protocol ppp Firewall packet-filter 3000 outbound Ip address 6.6.6.2 255.255.255.0 MSR-2: Interface Serial1/0 Link-protocol ppp Ip address 6.6.6.1 255.255.255.0 Assuming that the IP address of HostA is 192.168.0.2/24, the routing and other related interface configurations are correct, then . (choose one or Multiple) A. HostA can ping 6.6.6.2, but cannot ping 6.6.6.1 B. HostA cannot ping 6.6.6.2, nor can it ping 6.6.6.1 C. HostA can ping 6.6.6.2 and can also ping 6.6.6.1 D. Can ping HostA on MSR-2 Answer: A 372. The following ACLs are configured on the MSR router: Acl number 3999 Rule permit tcp source 10.10.10.1 255.255.255.255 destination 20.20.20.1 0.0.0.0 time-range lucky So the correct understanding of the ACL is. (choose one or more) A. The rule only takes effect during the lucky time period B. The rule only matches packets from 10.10.10.1 C. The rule only matches packets destined for 20.20.20.1 D. The rule can match TCP packets from any source network segment E. The rule can match TCP packets destined for any destination network segment. Answer: ACD 373. On the MSR router, you can use The command clears the NAT session entry. A. clear nat B. clear nat session C. reset nat session D. reset nat table Answer: C 374. To view debug information for NAT packets, you should use The command opens the debug information and outputs it to the display. A. terminal monitor Debugging nat B. terminal debugging Debugging nat C. terminal monitor Terminal debugging Debugging nat packet D. terminal monitor Terminal debugging Debug nat Answer: C

375. The IP address of the private network device A is 192.168.1.1/24, and its corresponding public IP address is 2.2.2.1. The IP address of the public network device B is 2.2.2.5. Device A is required to provide Telnet service to the public network. Which of the following configurations can be used on the NAT device? A. acl number 2000 Rule 0 permit source 192.168.1.1 0.0.0.255 Nat address-group 1 2.2.2.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 B. acl number 2000 Rule 0 permit source 192.168.1.1 0.0.0.255 Nat address-group 1 2.2.2.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 no-pat C. nat server protocol telnet global 2.2.2.1 inside 192.168.1.1 D. nat server protocol tcp global 2.2.2.1 telnet inside 192.168.1.1 E. nat server protocol tcp global 2.2.2.1 23 inside 192.168.1.1 23 Answer: E 376. Use ________ The command displays the NAT entry. A. display nat table B. display nat entry C. display nat D. display nat session Answer: D 377. The network environment is shown in the figure. Do the following NAT configuration on the router RTA:

[RTA]acl number 2000 [RTA-acl-basic-2000]rule 0 permit source 100.0.0.0 0.0.0.255 [RTA]nat address-group 1 200.76.28.11 200.76.28.20 [RTA]interface Ethernet0/1 [RTA-Ethernet0/1]nat outbound 2000 address-group 1 no-pat After the configuration, Client_A and Client_B access the server at the same time. The content of the NAT table of the RTA may be. A.

B.

C.

D.

Answer: A

378. On the MSR router, use ___________ The command displays the NAT aging time of the router. A. display nat time B. display nat expire C. display nat aging-time D. display nat time-out Answer: C 379. On the MSR router, use ______________ The command configures a NAT address pool. A. nat address-group B. nat ip pool C. nat net pool D. nat pool Answer: A 380. Use the display nat session command to view the NAT information, as shown below: There are currently 4 NAT sessions

From this information, the private network address is A. 192.80.28.12 B. 10.0.0.1 C. 192.80.29.4 D. 10.0.0.2 E. 192.80.28.11 Answer: BD 381. On the MSR router, if you want to view the number of NAT-converted packets, you should use __ command. A. display nat counter B. display nat C. display acl D. display nat session Answer: C 382. The IP address of a private network device A is 192.168.1.1/24, and its corresponding public IP address is 2.2.2.1; the IP address of the public network device B is 2.2.2.5. Which of the following configurations can I use on a NAT device if I want B to ping A? A. acl number 2000 Rule 0 permit source 192.168.1.1 0.0.0.255 Nat address-group 1 2.2.2.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 B. acl number 2000 Rule 0 permit source 192.168.1.1 0.0.0.255 Nat address-group 1 2.2.2.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 no-pat C. nat server protocol icmp global 2.2.2.1 inside 192.168.1.1 D. nat server protocol icmp global 192.168.1.1 inside 2.2.2.1 Answer: C

383. The network environment is as shown in the figure. Is the correct NAPT configuration.

A.

acl number 2000 Rule 0 permit source 192.168.0.2 0.0.0.255 Nat address-group 1 1.1.1.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 B. acl number 2000 Rule 0 permit source 192.168.0.2 0.0.0.255 Nat address-group 1 1.1.1.1 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 no-pat C. acl number 2000 Rule 0 permit source 192.168.0.2 0.0.0.255 Interface Ethernet 0/1 Nat outbound 2000 address-group 1 no-pat D. acl number 2000 Rule 0 permit source 192.168.0.2 0.0.0.255 Interface Ethernet 0/1 Nat outbound 2000 Answer: AD 384. The two branches of XYZ Corporation are interconnected by a synchronous leased line, using HDLC as the encapsulation protocol. The following is a statement about HDLC security. the correct one is. A. HDLC is not as rich as PPP, and HDLC can only use PAP authentication. B. HDLC is not as secure as PPP. It does not support PAP and CHAP authentication, but only provides clear text authentication. C. HDLC is not secure enough to provide two authentication methods, but the username and password in the authentication are transmitted in clear text. D. HDLC does not support authentication. Answer: D 385. The following statement about HDLC is correct. A. The HDLC protocol is a bit-oriented transport layer protocol. B. Any bit stream can be transparently transmitted on the HDLC link. C. The HDLC protocol adopts a unified frame format, so both data packets and protocol packets are transmitted in standard format on the HDLC link. D. HDLC can run on the same/asynchronous link, so it has a wide range of applications. Answer: BC 386. The following statement about HDLC is wrong. A. HDLC can run on the same/asynchronous link, so it has a wide range of applications. B. The HDLC protocol is a bit-oriented transport layer protocol. C. Any bit stream can be transparently transmitted on the HDLC link. D. The HDLC protocol adopts a unified frame format, so both data packets and protocol packets are transmitted in standard format on the HDLC link. Answer: AB

387. The following statement about HDLC is correct. A. The HDLC protocol is a bit-oriented data link layer protocol. B. HDLC can support IP address negotiation. C. The HDLC protocol adopts a unified frame format, so both data packets and protocol packets are transmitted in standard format on the HDLC link. D. HDLC can only run on asynchronous links. Answer: AC 388. The following description of PPP PAP verification is correct. A. PAP authentication is a second handshake protocol B. The username of PAP is plain text, but the password is confidential. C. The username of PAP is cipher text, and the password is plain text. D. PAP username and password are plain text Answer: AD 389. What is PPP going to negotiate during the LCP negotiation phase? A. Link layer encapsulation protocol type B. Verification method C. Maximum transmission unit D. Network layer protocol type Answer: BC 390. PPP goes through a series of negotiation processes before establishing a link. The correct negotiation order is A. LCP>PAP/Chap>NCP B. PAP/CHAP>LCP>NCP C. LCP> NCP>PAP/CHAP D. NCP>LCP>PAP/CHAP Answer: A 391. A. PAP/CHAP B. NCP C. LCP PPP goes through a series of negotiation processes before establishing a link. The correct negotiation order is. (Fill in the code of each step in turn, not in the middle Can have spaces, such as: ABC) Answer: CAB 392. Two MSR routers are back-to-back interconnected through their respective Serial1/0 interfaces, and the PPP link layer protocol is encapsulated on the WAN interface. The correct statement of the PPP link in this network is. A. The network layer protocol type carried on the PPP link needs to be determined in the NCP negotiation. B. When the PPP link starts to be established, the LCP and NCP negotiation starts simultaneously. C. IPX protocol can be carried on this PPP link D. If PPP authentication is not configured on both ends, the PPP link cannot be established normally. Answer: AC 393. The following statement about the characteristics of PPP is correct. A. PPP supports the same asynchronous link B. PPP supports authentication, including PAP authentication and CHAP authentication C. PPP can negotiate network addresses D. PPP can dynamically allocate IP addresses Answer: ABCD 394. During the establishment of a PPP session, when the physical layer is unavailable, the PPP link is stage. A. Establish B. Network C. Authentication D. Dead E. Terminate Answer: D 395. During the establishment of a PPP session, the PPP link enters when the physical layer is available. stage. A. Establish B. Network C. Authentication D. Dead E. Terminate Answer: A

396. During the establishment of the PPP session, when the authentication is set and the verification is passed, the PPP link enters stage. A. Establish B. Network C. Authentication D. Dead E. Terminate Answer: B 397. During the establishment of a PPP session, when authentication is set but verification fails, the PPP link enters stage. A. Establish B. Network C. Authentication D. Dead E. Terminate Answer: E 398. The following statement about frame relay address mapping is correct. A. Frame Relay address mapping is to associate the DLCI of the local device with the DLCI of the peer device. B. When carrying the IP protocol, Frame Relay Address Mapping is used to associate the next hop IP address with the local DLCI. C. Frame Relay address mapping can be manually configured. D. Frame Relay address mapping can be dynamically maintained using Inverse ARP. Answer: BCD 399. Which of the following protocols might be run between a Frame Relay DTE device and a Frame Relay switch? A. PVC B. SVC C. DLCI D. LMI Answer: D 400. Which of the following descriptions of Frame Relay DLCI is wrong? A. DLCI is used to identify a physical or logical interface on the router. B. The range of DLCI that users can use is 15~1007. C. In the frame relay switching network, the frame relay frame only changes the value of the destination DLCI, that is, the value of the next hop DLCI, without changing the value of the source DLCI of the source. D. Each virtual circuit uses a unique DLCI identifier on the same link Answer: ABC 401. Which of the following descriptions of Frame Relay DLCI is correct? A. DLCI is used to identify a physical or logical interface on the router. B. The range of DLCI that users can use is 16~1007. C. Each virtual circuit uses a unique DLCI identifier on the same link D. When the Frame Relay switching network transmits a Frame Relay frame, it only changes its destination DLCI, that is, the value of the next hop DLCI, without changing the source DLCI. Value Answer: BC 402. The router S0/0 interface accesses the network through frame relay. The following interface information is displayed on this router: [MSR]display interface Serial 0/0 Serial0/0 current state: UP Line protocol current state: UP Internet Address is 3.3.3.1/24 Primary Link layer protocol is FR IETF LMI DLCI is 0, LMI type is Q.933a, frame relay DTE LMI status enquiry sent 91, LMI status received 69 LMI status timeout 22, LMI message discarded 1 Then you know A. The LMI type of the interface package is Q.933a B. The virtual circuit number used by the interface is DLCI 0. C. The PVC status of the interface is already UP. D. This interface has sent 91 status query messages to query the PVC status of the interface. Answer: AD

403. An empty configured MSR router accesses the Frame Relay network through interface S1/0. To configure the Frame Relay subinterface on this router To achieve connectivity, the correct description about the Frame Relay subinterface is A. For the network layer, there is no difference between the subinterface and the main interface. B. Multiple virtual circuits can be configured on the sub-interface of the point-to-point type. C. Only one virtual circuit can be configured on the sub-interface of the point-to-point type. D. Multiple subinterfaces under one interface can be configured as the same IP subnet. Answer: AC 404. A network environment is like: HostA----GE0/0--MSR-1--S1/0-----Frame Relay----S1/0--MSR-2--GE0/0----HostB Among them, two routers MSR-1 and MSR-2 access the frame relay network through S1/0. Configure an IP address on the S1/0 interface of MSR-1 3.3.3.1/24 and DLCI 31, and configure IP addresses 3.3.3.2/24 and DLCI 82 on the S1/0 interface of MSR-2. Physical connection is completely normal The other default configurations are the same. So which of the following statements are wrong? A. On the Frame Relay network, DLCI 31 may identify the identity MSR-1 and DLCI 82 may identify the MSR-2. B. On the frame relay network, the correspondence between the DLCI 31 connected to the MSR-1 and the DLCI 82 connected to the MSR-2 must be correctly configured. The S1/0 interfaces of the routers can communicate with each other. C. During the Frame Relay network exchange process, the source DLCI is always 31 and the destination DLCI changes. Until the last hop, the target DLCI Become 82. D. After the command ip address negotiate is configured on the S1/0 interface of MSR-1, it can dynamically obtain the address from MSR-2. Answer: ACD 405. The three MSR routers RTA, RTB, and RTC access the same frame relay network through their respective S1/0 interfaces. This frame relay network can mention Provide enough PVC resources. As a network engineer, you need to assign IP addresses to these Frame Relay interfaces. Which of the following statements are correct? (choose one Or multiple) A. Under the premise of correctly configuring the route, three routers can communicate with each other through this frame relay network using only one IP subnet. B. If you do not allow any router to transit, you need at least two IP subnets to implement three routers through this frame relay network. Interoperability C. If it is not allowed to transit through any router, at least three IP subnets are required to implement three routers through this frame relay network. Two intercommunication D. Under the premise of correctly configuring routes, three routers can communicate with each other through this frame relay network without configuring sub-interfaces. Answer: ABD 406. Three MSR routers RTA, RTB, and RTC access the same frame relay network through their respective S1/0 interfaces. This frame relay network can mention Provide enough PVC resources. As a network engineer, you need to assign IP addresses to these Frame Relay interfaces. Which of the following statements are incorrect? (choose one or more) A. If you do not allow any router to transit, you need at least two IP subnets to implement three routers through this frame relay network. Interoperability B. If you are not allowed to transit through any router, you need at least three IP subnets to implement three routers through this frame relay network. Interoperability C. Under the premise of correctly configuring routes, three routers can communicate with each other through this frame relay network without configuring sub-interfaces. D. Under the premise of correctly configuring the route, three routers can communicate with each other through this frame relay network using only one IP subnet. Answer: B 407. Which of the following statements about Frame Relay is correct? (choose one or more) A. Configure Inverse ARP to automatically discover the DLCI address of the peer router. B. Frame Relay DTE device can query the permanent virtual circuit status on the interface through LMI C. Frame Relay network can realize the interconnection between multiple nodes, and can broadcast a certain frame to all nodes at one time. D. The permanent virtual circuit is a virtual circuit automatically allocated by the protocol, and its creation/deletion does not require manual operation.

408. The rate of the D channel in the ISDN BRI is. A. 54 Kbps B. 64 Kbps C. 36 Kbps D. 16 Kbps Answer: D 409. The rate of the D channel in the ISDN PRI is. A. 54 Kbps B. 64 Kbps C. 36 Kbps D. 16 Kbps Answer: B 410. When configuring ISDN DCC, the customer has the following configuration on their own MSR router: [MSR] dialer-rule 1 ip permit [MSR] interface dialer 0 [MSR-Dialer0] dialer enable-circular [MSR-Dialer0] ip address 100.1.1.1 255.255.255.0 [MSR-Dialer0] dialer-group 1 [MSR-Dialer0] dialer route ip 100.1.1.2 8810052 So which statements are correct about this configuration? (choose one or more) A. Using the polling DCC method B. Using shared DCC mod C. The packet destined for the 100.1.1.2 address dials the number 8810052 to establish the link. D. DCC does not trigger dialing if dialer-group 1 is not configured Answer: ACD 411. The client's router accesses the carrier network through DCC. Which of the following interfaces on the router can implement DCC dialing? A. Dialer interface B. Serial interface C. Async interface D. PRI interface Answer: ABCD 412. A company's MSR router plans to dial into the Internet through the ISDN DCC. The router has the following configuration: [H3C]dialer-rule 1 ip deny [H3C]firewall default permit The dial-up access control list dialer-rule 1 has been referenced under the dial-up interface. What are the following statements about dialing? A. No IP packets can trigger dialing B. Any IP packet can trigger dialing C. TCP type packets can trigger dialing D. UDP type packets can trigger dialing Answer: BCD 413. The command to change the link encapsulation from PPP to HDLC on the MSR router is .A. line hdlc B. link-protocol hdlc C. encapsulation hdlc D. line-protocol hdlc Answer: B 414. On the MSR router, you want to adjust the Keepalive message time of the HDLC protocol to 20 seconds. The correct configuration is A. In system view, use the command hdlc hold time 20 B. In system view, use the command hdlc timer hold 20 C. In interface view, use the command timer hold 20 D. In the interface view, use the command hold time 20 Answer: C

415. In the display interface command, which of the following LCP and NCP status indicates that the PPP link has been established? A. LCP Closed, IPCP Opened B. LCP Closed, IPCP Closed C. LCP Opened, IPCP Opened D. LCP Initial, IPCP Closed Answer: C 416. A network connection is like: HostA----GE0/0--MSR-1--S1/0------S1/0--MSR-2--GE0/0----HostB The two empty-configured MSRs, MSR-1 and MSR-2, are interconnected through their respective S1/0 interfaces, and their respective GE0/0 interfaces are divided. Do not connect client hosts HostA and HostB. All physical connections are normal. Now add the following configuration under the S1/0 interface of MSR-2: Interface Serial1/0 Link-protocol ppp Ppp pap local-user 123 password simple 456 Ip address 6.6.6.1 255.255.255.0 Then. (choose one or more) A. You only need to configure PPP encapsulation and IP address 6.6.6.2/24 on the S1/0 interface of MSR-1 to communicate with each other. B. If only PPP encapsulation and IP address 6.6.6.2/24 are configured on the S1/0 interface of MSR-1, they are not interoperable. C. When performing PAP authentication, MSR-2 will first send username 123 and password 456 to MSR-1. D. When performing PAP authentication, MSR-2 will first send password 456 to MSR-1 in clear text. Answer: AC 417. A network connection is like: HostA----GE0/0--MSR-1--S1/0------S1/0--MSR-2--GE0/0----HostB The two empty MSRs, MSR-1 and MSR-2, are interconnected back to back through their respective S1/0 interfaces, and their respective GE0/0 interfaces. Connect the client hosts HostA and HostB respectively. All physical connections are normal. Now add the following configuration under the S1/0 interface of MSR-2: Interface Serial1/0 Link-protocol ppp Ppp pap local-user 123 password simple 456 Ip address 6.6.6.1 255.255.255.0 Then. (choose one or more) A. If only PPP encapsulation and IP address 6.6.6.2/24 are configured on the S1/0 interface of MSR-1, they are not interoperable. B. Only need to configure PPP encapsulation and IP address 6.6.6.2/24 on the S1/0 interface of MSR-1 to communicate with each other. C. When performing PAP verification, MSR-2 will send 123 and 456 to MSR-1 first. D. When performing PAP authentication, MSR-2 will first send the username 123 to MSR-1 in plain text. Answer: BC 418. An MSR router is connected to the Internet through a WAN interface, and the following interface display information is displayed on the MSR router: Mp-group1 current state: UP Line protocol current state: UP Description: Mp-group1 Interface The Maximum Transmit Unit is 1500, Hold timer is 10 (sec) Internet Address is 172.16.1.100/24 Primary Link layer protocol is PPP LCP opened, MP opened, IPCP opened Physical is MP, baudrate: 64000 bps Then the correct analysis of the information shown above is. (choose one or more) A. The physical cable used by this interface is an MP cable. B. The link layer protocol of the interface is PPP. C. The interface Mp-group1 contains at least two physical interfaces. D. The network layer protocol running on this interface is IP. Answer: BD

419. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB Only the PPP protocol is encapsulated and the IP address is configured on the WAN interfaces S1/0 of the two routers MSR-1 and MSR-2. Currently HostA and HostB can ping each other. Add the command ppp authentication-mode chap to the MSR-1 interface S1/0, and then to the MSR-1. S1/0 performs the shutdown and undo shutdown operations. Then . (choose one or more) A. At this point, HostA and HostB can still ping each other. B. At this time, HostA and HostB cannot ping each other. C. MSR-2 will send Challenge, and send the user name with the local end to MSR-1 to start CHAP authentication. D. MSR-1 will send Challenge, and send the user name with the local end to MSR-2 to start CHAP authentication. Answer: BD 420. The WAN link of the two routers MSR-1 and MSR-2 of the customer adopts the PPP protocol, and MSR-1 is required as the primary authenticator. The CHAP mode verifies MSR-2, so which of the following configurations might be required for MSR-2? (choose one or more) A. [MSR-2]ppp chap user user B. [MSR-2]ppp chap password simple password C. [MSR-2-Serial1/0] ip address ppp-negotiate D. [MSR-2-Serial1/0] ip address 10.10.10.1 22 Answer: CD 421. The WAN link of the two routers MSR-1 and MSR-2 of the customer adopts the PPP protocol, and MSR-1 is required to pass the primary authentication party. The PAP mode verifies the MSR-2, so what configuration is required on the MSR-2? A. [MSR-2-Serial0/0] ppp pap user user B. [MSR-2-Serial0/0] ppp pap password simple password C. [MSR-2] ppp pap local-user user password simple password D. [MSR-2-Serial0/0] ppp pap local-user user password simple password Answer: D 422. The two branches of XYZ are in different regions, with WAN connections being established. According to the plan, the WAN adopts the PPP protocol. Considering the network security, the message information of the password type is not allowed to be transmitted in clear text on the network. Which of the following PPP authentication protocols should be adopted? A. PAP B. CHAP C. MD5 D. 3DES Answer: B 423. In a PPP connection, the statement about NCP is wrong. A. NCP is used for negotiation verification B. NCP is used to negotiate the format and type of data packets transmitted on the data link C. NCP is used to establish, tear down and monitor data links D. NCP can configure different network layer protocols Answer: AC 424. I want to set the Frame Relay LMI type to ANSI, which should A. Use the command fr lmi type ansi in system mode B. Use the command fr lmi type ansi in interface mode C. Use the command fr lmi class ansi in system mode D. Use the command fr lmi class ansi in interface mode Answer: B 425. The display fr map-info command displays the following information: [RTA]display fr map-info Map Statistics for interface Serial1/0 (DTE) DLCI 30, Point-to-Point DLCI, Serial1/0.1 Created at: 2008/09/17 17:46:59, status: ACTIVE DLCI 40, Point-to-Point DLCI, Serial1/0.2 Created at: 2008/09/17 17:48:22, status: INACTIVE The following statement is correct A. Two point-to-point subinterfaces are created under interface Serial1/0. B. Both PVCs shown in the display message have been created. C. This router is used as a user side device. D. It is correct in everything.

426. The customer's network connection is as shown. The IP addresses of RTA, RTB and RTC are 2.2.2.1/24, 2.2.2.2/24 and 2.2.2.3/24 respectively. To implement interworking between RTA and RTB and RTC, which of the following Frame Relay MAPs are configured correctly on the RTA?

A. fr map ip 2.2.2.1 40 B. fr map ip 2.2.2.2 40 C. fr map ip 2.2.2.1 40 60 D. fr map ip 2.2.2.3 50 Answer: BD 427. The customer's two MSR routers, MSR-1 and MSR-2, are interconnected back-to-back via their respective S0/0 interfaces. On two MSR routers Frame relay protocol initiated and encapsulated between S0/0 interfaces, where MSR-1 is the frame relay DCE side and MSR-2 is the frame relay DTE side. for To save resources, frame relay sub-interfaces are configured on both routers, which are configured as follows: MSR-1: Interface Serial0/0.40 p2p Fr dlci 222 Ip address 30.2.2.2 255.255.255.252 MSR-2: Interface Serial0/0.100 p2p Fr dlci 222 Ip address 30.2.2.1 255.255.255.252 Then according to this configuration can be speculated. (choose one or more) A. Cannot ping 30.2.2.1 on MSR-1 B. Can ping 30.2.2.1 on MSR-1 C. The two routers' frame relay sub-interfaces cannot communicate with each other because no fr map is configured. D. The two routers' frame relay sub-interfaces cannot communicate with each other because their sub-interface numbers are inconsistent. Answer: B 428. The equipment that should be used at the box in the figure is

A. Router B. CSU/DSU C. WAN switch D. Modem Answer: A

429. The two routers RTA and RTB use serial back-to-back interconnects, where the RTA serial port is configured with HDLC protocol and the RTB serial port. The PPP protocol is configured. The correct IP address is configured on both devices, then what happens is. (choose one or more) A. RTB serial port physical layer up, protocol layer down B. RTB serial port physical layer down, protocol layer down. C. RTA serial port physical layer up, protocol layer remains up, but RTA cannot ping RTB D. RTA serial port physical layer down, protocol layer down E. Both the physical layer and the protocol layer of the RTA and RTB serial ports are down. Answer: A 430. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB The customer's WAN network only supports the synchronous mode, so the S1/0 interface of the two routers can run.. (choose one or more) A. PPP+RIP B. HDLC+OSPF C. PPP+OSPF D. HDLC+RIP Answer: ABCD 431. The customer's network connection is like: HostA----GE0/0--MSR-1--S1/0-----WAN----S1/0--MSR-2--GE0/0----HostB The customer's WAN network only supports the synchronous mode, and the S1/0 of the MSR-2 needs to obtain the IP address from the peer MSR-1 negotiation instead of the hand. Dynamically configure a static IP address. Then the S1/0 interface of the two routers can run.. (choose one or more) A. PPP B. HDLC C. PPP+RIP D. HDLC+RIP Answer: AC 432. A router interface information is displayed as follows: Serial0/0 current state: UP Line protocol current state: DOWN Physical layer is synchronous, Baudrate is 64000 bps Interface is DCE, Cable type is V35, Clock mode is DCECLK So which protocol might be encapsulated or running on this interface? A. PPP B. HDLC C. Frame Relay D. RIP E. The above answers are not correct. Answer: ABCD 433. The following debugging information was seen on an MSR router: *Jan 23 09:17:36:720 2009 H3C RM/6/RMDEBUG:Source Address: 192.168.1.1 *Jan 23 09:17:36:770 2009 H3C RM/6/RMDEBUG:Destination Address: 224.0.0.5 *Jan 23 09:17:36:871 2009 H3C RM/6/RMDEBUG:Ver# 2, Type: 1, Length: 48. *Jan 23 09:17:36:972 2009 H3C RM/6/RMDEBUG: Router: 192.168.1.1, Area: 0.0.0.0, Checksum: 62961. *Jan 23 09:17:37:72 2009 H3C RM/6/RMDEBUG:AuType: 00, Key(ascii): 0 0 0 0 0 0 0 0. *Jan 23 09:17:37:173 2009 H3C RM/6/RMDEBUG: Net Mask: 255.255.255.0, Hello Int: 10, Option: _E_. Then according to the above information. (choose one or more) A. RIPv1 is not running on this router. B. The router may be running RIPv2 C. The routing protocol running on this router supports VLSM D. The router may be running OSPF. Answer: D

434. View the following debug information on the customer's router MSR 30: *0.87831022 IP/8/debug_icmp: ICMP Receive: ttl-exceeded(Type=11, Code=0), Src = 3.3.3.1, Dst = 3.3.3.2; Origi Nal IP header: Pro = 1, Src = 3.3.3.2, Dst = 20.1.1.1, First 8 bytes = 080081FF ABD40004 *0.87833017 IP/8/debug_icmp: ICMP Receive: ttl-exceeded(Type=11, Code=0), Src = 3.3.3.1, Dst = 3.3.3.2; Origi Nal IP header: Pro = 1, Src = 3.3.3.2, Dst = 20.1.1.1, First 8 bytes = 08007A2E ABD40005 According to this, we can speculate. A. The destination address of the ICMP packet is 3.3.3.2. B. The destination address of the ICMP packet is 20.1.1.1. C. There may be a routing loop because the information shows ttl-exceeded D. The command ping 20.1.1.1 was executed on the router with IP address 3.3.3.2. Answer: BCD 435. Run OSPF between four MSR routers and divide the area. The connection and division are as shown. Know all links in the network

The OSPF Cost values are all 10, so the correct description about this figure is. (choose one or more) A. Four routers in the network are ABR (Area Border Router) B. After the link between Area 0 fails, the path of RTA accessing RTB is RTA->RTD->RTC->RTB C. RTA access RTC has two equal paths, RTA->RTB->RTC and RTA->RTD-RTC D. RTD access RTB will prefer RTD->RTA->RTB path Answer: D 436. According to the definition of the OSI seven-layer reference model, Responsible for providing flow control, verifying the correctness of data transmission, and providing a variety of upper layers Agreement support. (choose one or more) A. Application layer B. Data link layer C. Presentation layer D. Transport layer E. Network interface layer F. Physical layer G. Session layer H. Network layer Answer: BD

437. The WAN interface S0/0 of the two routers MSR-1 and MSR-2 of the customer adopts PPP protocol, and the router learns each other by configuring RIP. The route of the peer end, which has the following configuration on MSR-1: Rip 1 Network 0.0.0.0 Import-route static # Ip route-static 0.0.0.0 0.0.0.0 Serial0/0 Then the wrong explanation about this configuration is. A. RIP introduces a statically configured default route and publishes it to MSR-2 B. RIP 1 in the configuration means that the configured RIP version is the V1 version. C. By configuring MSR-1 as above, the default route will not be dynamically advertised to the peer through RIP. D. By configuring MSR-1 as above, you can dynamically advertise the default route to the peer through RIP. Answer: ABC 438. The client router S0/0 accesses the frame relay network and displays the following information on the interface of the router: Serial1/1 current state :UP Line protocol current state :DOWN Internet Address is 3.3.3.2/24 The protocol status of the interface is DOWN, so the analysis is based on this. A. The interface may encapsulate the PPP protocol. B. The physical link may be faulty C. The LMI type of the package may be inconsistent with the far end D. If the interface encapsulates the Frame Relay protocol, the status of the PVC should be DOWN. Answer: AC 439. The following statement is correct. (choose one or more) A. DCE (Data Circuit Terminating Equipment) equipment and its communication network The connection constitutes the user network interface of the network terminal. It provides a physical connection to the network for forwarding traffic and provides one for A clock signal that synchronizes the data transfer between the DCE device and the DTE device. B. DTE (Data Terminal Equipment) device refers to a device located at the user end of the user network interface, which can serve as a source, The sink or both are both. A data terminal device is connected to a data network via a data communication device (eg, a modem) and typically A clock signal generated by a data communication device. Both modems and interface cards are examples of DTE devices. C. CSU (Channel Service Unit): A digital interface device that connects an end user to a local digital telephone loop. usually It and the DSU are collectively referred to as CSU/DSU. CSU devices include devices such as computers, protocol translators, and demultiplexers. D. DSU (Data Service Unit): refers to a device used in digital transmission, which can put the physical on the DTE device. The layer interface is adapted to communication facilities such as T1 or E1. The data service unit is also responsible for functions such as signal timing, which is usually mentioned together with CSU. As a CSU/DSU. Answer: AD 440. The following statement about the WAN is wrong. A. The HDLC protocol only supports point-to-point links and does not support point-to-multipoint links. B. The HDLC protocol can be encapsulated on a synchronous link or encapsulated on an asynchronous link. C. When the CE1/PRI interface uses the E1 working mode, it is equivalent to an interface with no time slot and 2 Mbps data bandwidth. The same step serial port supports PPP, Frame Relay, LAPB and X.25 data link layer protocols, and supports network protocols such as IP and IPX. D. When the CE1/PRI interface uses the CE1/PRI working mode, it is physically divided into 32 time slots, and the corresponding number is 0 to 31. The gap is used to transmit synchronization information. Answer: CD

441. The basic process of Layer 2 forwarding of an Ethernet switch includes A. Add or refresh a MAC address entry according to the source MAC address and VLAN ID information of the received Ethernet frame. B. Find a MAC address table according to the destination MAC address, and if no match is found, broadcast in the VLAN corresponding to the packet; C. If a match is found, but the port corresponding to the entry does not belong to the VLAN corresponding to the packet, the frame is discarded. D. If a match is found and the port corresponding to the entry belongs to the VLAN corresponding to the packet, the packet is forwarded to the port, but if the entry corresponds to the entry If the port is the same as the port that receives the Ethernet frame, the frame is discarded. Answer: BCD 442. Regarding the composition of the ISDN network, the following statement is correct.. A. The ISDN network consists of an ISDN terminal, a terminal adapter, a network terminal device, an ISDN access router, and an ISDN switch. B. The ISDN terminal and terminal adapter form the user side of the ISDN network. C. ISDN switches are usually devices on the ISDN user side. D. The ISDN terminal can be an ISDN telephone. Answer: ABD 443. A user wants to use WAN access. Since the average traffic is small, the average bandwidth is only 50Kbps, but the real-time requirements are very high. The User budgets are very limited, so you must consider the cost of use. The most suitable access method is. A. ISDN BRI B. ISDN PRI C. PSTN dialing D. DDN line Answer: A 444. The customer's two MSR30 routes are interconnected via WAN interface S0/0, running both PPP and RIP protocols. For security Consider PPP PAP authentication and RIP plain text authentication separately. Then the similarities between the two verification methods are. A. Both are handshaking verification methods B. All pass the plaintext keyword on the network C. Username and password are transmitted in clear text on the network D. Both use 128bit key length Answer: B 445. The customer's routers MSR-1 and MSR-2 are interconnected through their respective GigabitEthernet0/0, and the two routers are running. RIP and RIP have correctly completed remote routing learning. The following configuration has been added to MSR-1: Firewall enable acl number 3000 Rule 0 deny udp destinationPort eq 520 rule 5 permit ip Apply this ACL to the inbound direction of GigabitEthernet 0/0 on MSR-1. Then. A. There is still a RIP route to the peer on MSR-1. B. The peer RIP route cannot be learned on MSR-1. C. There is still a RIP route to the peer on MSR-2. D. The RIP route of the peer cannot be learned on MSR-2. Answer: BC 446. The customer's MSR router connects to the carrier network through the S0/0 interface and connects to the internal network through the G1/0 interface. Current network operation Normal customers can access all Internet and intranet services through the router. Now add the following configuration on the MSR: Firewall enable firewall default deny acl number 3002 Rule 0 deny tcp interface Serial0/0 link-protocol ppp Firewall packet-filter 3002 Inbound firewall packetFilter 3002 outbound So which of the following applications may not be affected A. Learning routing with RIP through the carrier B. Learning routing with OSPF through OSPF C. Learning routes between BGP and operators D. Visiting the information technology website in Shanghai