Valid H12-831_V1.0-ENU Exam Dumps are Your best Choice to Pass

1. In the IS-IS IPv6 network shown in the figure, the interfaces of R1 and R2 both have two IPv6 addresses. Since the prefix lengths of the IPv6 addresses of R1 and R2 are different, they cannot establish a neighbor relationship.

2. Network engineers found that the multicast client could not receive multicast data correctly, so they suspected that the group address set by the multicast server was wrong.

Which of the following cannot be the group address?

3. If the users connected to the switch change frequently, you can convert the dynamic MAC address to a sticky MAC address through port security. In this way, when the user changes, the bound old MAC address table entry can be cleared in time through the aging of the table entry.

4. In the network shown in the figure, the administrator first completes the routing configuration as shown in the options, and then enables MPLS and LDP functions on all devices and interconnected interfaces of R1-R3, so as to realize the traffic from PC1 to PC2 forwarding based on MPLS in the network.





Which of the following routing configuration options can achieve this function?

5. On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are RRs (Route Reflectors), and R1, R4, R3, and R6 are clients. The iBGP peer relationships are established using Loopback0 on each router, and the router ID is 10.0.0.X/32, where X is the number of the router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import-route command.

Which of the following statements are true?





A. The routing table of R4 contains two equal-cost default routes.

B. The route 192.168.1.0/24 in the routing table of R3 has two next hops.

C. The routing table of R1 does not contain the route 192.168.2.0/24.

D. For 192.168.1.0/24, R3 preferentially selects the BGP route received from R2, and R6 preferentially selects the BGP route received from R5.

6. During the preparation stage of the cutover project, software and hardware testing needs to be performed. Please match the operation objects and corresponding operation contents in the following preparation stage.

7. A message with a destination IP address of 4.4.4.4 forwarded by R1 is transmitted in an MPLS network. Part of the LSP information of R3 is shown in the figure.





Which of the following devices will perform MPLS label operations during the transmission of the message? (Multiple choice)

8. As shown in the figure, in order to ensure the normal MACsec session negotiation between the switch Core and ACC_1, the switch AGG_1 is required to support the Layer 2 protocol transparent transmission function.

9. Which of the following is not included in the OSPF Hello message?

10. In the network shown in the figure, the DHCP Server function is enabled on the R2 GE0/0/0 interface, and the address pool is the interface address pool. The R1 GE0/0/0 and GE0/0/1 interfaces are used as DHCP clients. By default, only one interface can obtain an IP address.

11. LSR (Label Switching Router) discovers LDP peers through the LDP discovery mechanism and establishes LDP sessions.

Which of the following descriptions of LDP sessions are correct? (Multiple choice)

12. To support the processing and calculation of IPv6 routes, IS-IS adds a new MLPID in TLV No. 129.

MLPID is an 8-bit field that identifies a network layer protocol message.

Which of the following is the MLPID value for IPv6?

13. In the OSPFv3 network shown in the figure, the IPv6 address of R3 Loopback0 interface is 2000::3/128, and OSPFv3 is enabled.





Which of the following descriptions are correct? (Multiple choice)

14. What types of LSAs must a router running OSPFv3 generate? (Multiple choice)

15. In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128.





By default, which of the following routers does not have a route to 2000::4/128 in its routing table?

16. In a BGP/MPLS IP VPN network, when a PE device advertises VPNv4 routes, which of the following information will it carry? (Multiple choice)

17. When the administrator enters the command label advertise explicit-null on the egress device in the MPLS network, which of the following labels is assigned to the penultimate hop device?

18. As shown in the OSPF network, the area number has been marked in the figure, where Area 1, Area 2, and Area 3 are all common areas. The IP address of the R5 Loopback0 interface is 10.0.5.5/32, and the interface enables OSPF through the network method.





On the GE0/0/1 interface of R5 and the GE0/0/2 interface of R1, "ospf filter-Isa-out all" is configured.

Which of the following routers' routing tables do not contain a route entry for 10.0.5.5/32? (Multiple choice)

19. In the network shown in the figure, the OSPF protocol is deployed between R2 and R1, and the IS-IS protocol is deployed between R2 and R3. In order for R1 to obtain the route to 10.0.3.3/32, the IS-IS route is introduced into the OSPF route on R2. The FA address in the Type5 LSA generated by R2 is ().

20. As shown in the figure, R1, R2, and R3 run WPLS, and the administrator configures a static LSP from the 1.1.1.0/24 network segment to the 3.3.3.0/24 network segment.





Which of the following descriptions of this scene are correct? (Multiple choice)

21. On the OSPFv3 network shown in the figure, the LSDB of R2 contains ____ Router-LSAs. (Enter only digits.)

22. Use the "display current-configuration |include 10.0.2.*" command on the router to see all the information including "10.0.2" in the current configuration.

23. When the administrator statically configures the Ingress node of LSP, it is recommended to establish a static LSP by specifying the next hop to ensure that there is a routing entry in the local routing table that exactly matches the specified destination IP address.

24. On the OSPFv3 network shown in the figure, area 1 is a common are R2 generates an Inter-Area-Prefix-LSA to describe the routes of a network segment in the area. Such an LSA exists in both area 0 and area 1.

25. In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128, and "ipv6 summary 2000::64 level-1-2" is configured in the R4 IS-IS process.





Which of the following is wrong in the default case?

26. The LSP information generated by a certain IS-IS router is shown in the figure. From the LSP information, it can be inferred that the router is not the DIS of this link.

27. In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is an NSSA area, and areas 2 and 3 are common areas. The "default-route-advertise always" command is configured in the SPF process of R5.





Which of the following routers have default routes in their routing tables? (Multiple choice)

28. In the network shown in the figure, IS-IS IPv6 runs between R2, R6, and R3, and the IPv6 address of R6 Looback0 interface is 2000::6/128. Other links run OSPFv3, area 1 is a Stub area, and area 2 is an NSSA area.





IS-IS routes are imported into OSPFv3 on R2 and R3.

Which of the following descriptions are wrong? (Multiple choice)

29. Which of the following phenomena may occur when a layer 2 loop appears in the network? (Multiple choice)

30. In the hub-spoke networking shown in the figure, to ensure correct route transmission, an administrator must manually configure the peer 10.1.2.1 _____ command in the IPv4 address family view of the BGP-VPN_out instance on the Hub-PE.





(Enter the answer in lowercase letters only.)

31. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500x, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.





By default, among the routes received by R6 regarding 192.168.1.0/24, which of the following has the longest AS_path?

32. On the IS-IS IPv6 network shown in the figure, multi-topology is enabled on all routers.

The ipv6 default-route-advertise always level-1 command is configured in the IS-IS process of R4.





Which of the following routers does not have the default route in its routing table?

33. Network administrators can run the clock time zone command to set the time zone of a device. If two network devices have different time zone settings, they cannot establish a neighbor relationship using a dynamic routing protocol.

34. In a BGP/MPLS IP VPN network, if you want to modify the RD value of a VPN instance, you must first enable the address family corresponding to the VPN instance or delete the VPN instance.

35. In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R5 Lopback0 interface is 2000::5/128, which is introduced into OSPFv3 through import. The Router ID of each device is 10.0.X.X, where X is the device number.





Which of the following descriptions are correct? (Multiple choice)

36. In the hub-spoke networking shown in the figure, the Hub-PE can be configured to allow repetitive local AS numbers for correct route transmission.

37. The administrator uses the display mpls lsp command to view the LSP of the device. The output information is shown in the figure.





Which of the following descriptions of the information is correct?

38. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import.





If the "ageregate 192.168.1.016 detail-suppresed command" is configured on R1, which of the following is the traffic path from R3 to 192.168.1.0/24?

39. The LSP information generated by an IS-IS router itself is shown in the figure. From the LSP information, it can be inferred that the router is configured with 5 IPv6 addresses.

40. In the BGP/MPLS IP VPN network, PE and P devices exchange public network labels by running MP-BGP, so that P devices can forward data based on labels.

41. In the network shown in the figure, the IP addresses planned for the interconnection interfaces of R1 and R2 have been marked in the figure, but R1 and R2 cannot be Pine connected. Therefore, the network engineer checked the configuration of the R1 and R2 interfaces and judged based on the configuration information that the wrong mask configuration of the R2 interface was the cause of the fault.

42. In the network shown in the figure, R1 and R2 use the direct connection interface to establish a BGP neighbor relationship. There is debug information on R2 as shown in the figure. Please match the following content according to the information.

43. VLAN aggregation is configured on a switched network. Sub-VLAN 2 and Sub-VLAN 3 are added to Super-VLAN 10.

To enable hosts in different Sub-VLANs to communicate with each other, run the _____ inter-sub-vlan-proxy enable command in the view of VLANIF 10, corresponding to the Super-VLAN.

(Enter the answer in lowercase letters only.)

44. In an IPLS network, when the S field value of the MPLS message received by the Egress device is (), it indicates that the label is the bottom label of the stack and IP forwarding is performed directly.

45. In the IS-IS IPv6 network shown in the figure, all routers have multi-topology enabled. The IPv6 address of the R4 Loopback0 interface is 2000::4/128. Configure "ipv6 summary 2000::64 level-2" in the R2 and R1 IS-IS processes. Configure "ipv6 import-route isis level-2 into level-1" in the R1, R2, and R3 IS-IS processes.





By default, which of the following routers have a route entry for 2000::/64 in their routing table?

46. On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2 and R5. In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are RR (Route Reflectors), and R1, R4, R3, and R6 are the iBGP peer relationship clients. The iBGP peer relationship ID is 10.0.0.X/32, where X is the number of the iBGP router. R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import-route command.

Which of the following statements are true?





A. The routing table of R4 contains two equal-cost default routes.

B. The route 192.168.2.0/24 in the routing table of R4 has two different outbound interfaces.

C. The routing table of R1 contains two equal-cost default routes.

D. The routing table of R1 contains the route 192.168.2.0/24.

47. In the network shown in the figure, IS-IS IPv6 runs between R2, R6, and R3, and the IPv6 address of R6 Looback0 interface is 2000::6/128.





Other links all run OSPFv3. Area 1 is a stub area and Area 2 is an NSSA area.

IS-IS routes are imported into OSPFv3 on R2 and R3.

Which of the following methods can enable R4 to ping 2000::6? (Multiple choice)

48. MP-BGP adds a new path attribute MP_REACH_NLRI to publish VPNv4 routing information or withdraw unreachable routes in BGP/MPLS IP VPN networks

49. The device operating environment is crucial for stable device operating, including the equipment room, power supply, and heat dissipation. Maintenance personnel must be on site to maintain the device operating environment.

50. In a BGP/MPLS IP VPN network, the configuration of some PE options is to update VPN routes through Update messages.

Which of the following information will be included in the Update message? (Multiple choice)

51. DRAG DROP

When configuring port security on a switch, the administrator also enables static MAC address flapping detection. If static MAC address flapping occurs, the switch takes the configured action to protect the interface.

Match the names of interface security protection actions wi th corresponding operations.

52. Each OSPFv3 router generates a Link-LSA for each link, describing information such as the link-local address, IPv6 prefix address, and interface number on this link, and provides link options to be set in the Network-LSA, which is only propagated within this link.

53. When dealing with a fault in the existing network, a network engineer drew a topology diagram as shown in the figure. All routers run SPF.





Which of the following descriptions about the access path between PC1 and PC2 is correct?

54. The networks of large and medium-sized enterprises can be divided into access layer, aggregation layer and core layer. Network engineers need to formulate cutover plans for any operations performed at any layer that affect the existing network services.

55. The BGP protocol supports the use of the "filter-policy acl-number import" command to subtract the received routing information. The value range of acl-number is 2000~3999.

56. In the network shown in the figure, R1 and R2 have established an EBGP neighbor relationship through the Loopback0 interface. R1 introduces the route 2001::1/128 into BGP. In the Update message sent by R1, the value of the Next Hop field in MP_REACH_RI is 2000::1.

57. The network and VPN planning of a certain enterprise is shown in the figure. Please match the sites through which business traffic can communicate one by one.

58. On the IS-IS IPv6 network shown in the figure, after the network becomes stable:

R1 can ping 2000:12::0, and the display ipv6 neighbors command can be used to display the MAC address corresponding to 2000:12::0.





Is this statement TRUE or FALSE?

59. BFD for OSPF refers to the association of BFD with OSPF to speed up OSPF's response to network topology changes. The OSPF neighbor relationship can enter the Full state only after the BFD session goes up. The OSPF neighbor relationship can go down only after the BFD session goes down.

60. OSPPv3 is running between R1 and R2, and the IPv6 addresses configured on the interfaces are marked in the figure. The Router ID of R1 is 10.0.1.1, and the Router ID of R2 is 10.0.2.2.





Which of the following is true about the default situation?

61. A campus network is connected through Huawei S series switches. The administrator has enabled the MAC drift detection function in the network.

Which of the following descriptions of this function is wrong?

62. On a BGP/MPLS IP VPN network, which of the following are carried when a PE advertises VPNv4 routes?

63. In a certain MPLS network, the LSP information of R1 and R2 is shown in the figure. At this time, the administrator enters the command ping3.3.3 on R1.





Which of the following descriptions of this scenario is correct?

64. On an MPLS network, when a transit device receives an MPLS packet and is ready to swap labels, it finds that the label value after swapping is 0.

In this case, which of the following operations will the device perform?

65. On the network shown in the figure, the DHCP server function is enabled on GE0/0/0 of R2, and the address pool is an interface address pool.

When GE0/0/0 and GE0/0/1 of R1 function as DHCP clients, only one interface can obtain an IP address by default.

66. On the network shown in the figure, IS-IS runs on R1, R2, R4, and R5, and the area ID is 49.0001. IS-IS runs on R3 and R6, and the area ID is 49.0002. The import-route isis level-2 into level-1 command is configured on R2.

In AS 65000, R1, R3, R4, and R6 each establish iBGP peer relationships with R2 and R5. R2 and R5 are Route Reflectors (RRs), and R1, R4, R3, and R6 are clients.

The iBGP peer relationships are established using Loopback0. The IP address of Loopback0 on each router is 10.0.X.X/32, and the router ID is 10.0.X.X, where X is the number of the router.

R1 and R4 import the external route 192.168.1.0/24 to BGP through the import-route command, and R3 and R6 import the external route 192.168.2.0/24 to BGP through the import-route command.





Which of the following statements are true?

A. The route 192.168.2.0/24 in the routing table of R4 has two next hops.

B. The routing table of R1 contains two equal-cost default routes.

C. The routing table of R4 contains two equal-cost default routes.

D. The routing table of R1 contains the route 192.168.2.0/24.

67. The MPLS architecture consists of the control plane and forwarding plane, each of which contains multiple protocols and entries.

Which of the following tables is used to forward MPLS labeled packets?

68. The entries in the MAC address table are divided into dynamic entries, static entries and black hole entries. At the same time, there is also a service type of MAC address entry in the MAC address table of the switch, which is generally converted from dynamic entries.

69. A network engineer enters "dir" on the device and obtains the following file names.

Which of the following is most likely to be the version file of the device?

70. The AS-path attribute is a private attribute of the BGP protocol. The "if-match as-path-filter" command is only valid for BGP routes.

71. In the OSPF network shown in the figure, the cost value of the link is marked in the figure. R1 has enabled OSPP IP FR and configured the "maximum load-balancing 8" command in the OSPF process.





Which of the following is the cost value of reaching 10.0.35.0/24 in R1's routing table?

72. In the Hub&Spoke network shown in the figure, Hub-PE can allow local AS number duplication through manual configuration to achieve correct routing transmission.

73. If end-to-end QoS is configured on an MPLS network, the penultimate hop device on the MPLS network can pop MPLS labels from packets based on penultimate hop popping (PHP), so that the egress node can process packets based on the QoS priority in inner packets.

74. 168.2.0/24 to BGP through the import-route command.

Which of the following statements are true?





A. The routing table of R4 contains two equal-cost default routes.

B. The route 192.168.1.0/24 in the routing table of R3 has two next hops.

C. The routing table of R1 does not contain the route 192.168.2.0/24.

D. For 192.168.1.0/24, R3 preferentially selects the BGP route received from R2, and R6 preferentially selects the BGP route received from R5.

75. R4's Router ID is 10.0.4.4. In R4's LSDB, the LSA shown in the figure is seen. The network engineer makes the following inferences based on the LSA.





Which of them are correct? (Multiple choice)

76. An administrator uses the display mls ldp session command to check the establishment of the LDP session between R1 and R2. The output information is shown in the figure.





Which of the following descriptions of the information are correct? (Multiple choice)

77. In the OSPFv3 network shown in the figure, area 1 is a normal area.





Which of the following descriptions are correct? (Multiple choice)

78. In the OSPFv3 network shown in the figure, the OSPFv3 related parameters are the default configuration. When checking the LSDB on one of the devices, some content is omitted in the LSDB. The Router IDs of R1, R3, and R4 are 10.0.1.1, 10.0.3.3, and 10.0.4.4 respectively. The Origin Router part of some LSAs is hidden. Please complete this part.

79. Please match the characteristics and functions of the IS-IS protocol.

80. The Router-LSA generated by a router is shown in the figure.





Based on this LSA, which of the following descriptions are correct? (Multiple choice)

81. There are three routers in an OSPFv3 network. The LSDB shown in the figure is seen on one of the routers.





Determine the role of the router based on its Router ID.

82. In the enterprise network shown in the figure, R3 is connected to the enterprise network management server, and all devices in the network communicate with the network management server through VPN.





During the inspection, it was found that R3 had redundant RT configurations.

Which of the following commands can be executed on R3 to delete the redundant RTs without affecting the connectivity of all devices and the network management server? (Multiple choice)

83. In the OSPF network shown in the figure, the area numbers are marked in the figure, where area 1 is a common area, area 2 is a stub area, and area 3 is an NSSA area.





If R5 introduces an external route 10.0.5.5/32, which of the following routers does not have a route entry for 10.0.5.5/32 in its routing table?

84. On an MPLS network, after an LSR receives a Hello message from a peer, the LSR establishes an LDP adjacency with the peer. The Hello message is sent in multicast or unicast mode.

TRUE

FALSE

85. The debug output information of an OSPF router is shown in the figure.





Which of the following is the Router ID of this router?

86. When new features are added or the original performance needs to be optimized, or when problems with the current running version need to be solved, the device needs to be upgraded. At this time, a higher version of the system software needs to be loaded and the device needs to be restarted to achieve this. Huawei NetEngine AR series devices use the same software package, such as AR6120, AR6280, and AR6000V.

87. The information generated by the device can be output to the console, remote terminal, log buffer, log file, SNMP agent, etc.

By default, which of the following output directions can receive Trap information? (Multiple choice)

88. In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command.





Which of the following descriptions are correct? (Multiple choice)

89. Which of the following reasons may cause the local device to be unable to learn the ARP information of the other device? (Multiple choice)

90. The Route-LSA generated by a router is shown in the figure.





Which of the following descriptions are correct? (Multiple choice)

91. When a device is abnormal or fails, it will generate a variety of information. According to the severity or urgency of the information, the information is divided into 8 levels.

Which of the following has the highest severity level?

92. In the OSPFv3 network shown in the figure, routers are interconnected using Ethernet links.





By default, the number of DRs in this network is which of the following?

93. As shown in the figure, the administrator wants to enable the MPLS LDP function of devices R1~R4.





Which of the following configurations about R1 is correct?

94. In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3 enabled, and the Router ID of each device is 10.0.X.X, where X is the device number. Check the detailed information of a certain LSA on R3. From the output information, it can be inferred that the LSA is generated by R2, and it describes the IPv6 prefix address associated with the Network-LSA.

95. In the network shown in the figure, R1, R2, R4, and R5 run IS-IS in area 49.0001, R3 and R6 run IS-IS in area 49.0002, and "import-route isis level-2 into level-1" is configured on R2 and R5. Within AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, of which R2 and R5 are RRs, and R1, R4, R3, and R6 are clients. R2 and R5 also establish an IBGP neighbor relationship and configure the same Cluster ID. IBGP neighbor relationships are all established using the Loopback0 interface. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 import the external network 192.168.1.0/24 into BGP, and R3 and R6 import the external network 192.168.2.0/24 into BGP. In the BGP process of all routers, configure "maximum load-balancing ibgp 8".





Which of the following descriptions are correct by default? (Multiple choice)

96. In CE multi-homing scenarios, if BGP AS number substitution is enabled on PEs, you can run the peer soo command on the EBGP peers of the PEs and CE to configure the Site of Origin (SoO) attribute to prevent loops.

97. In the network shown in the figure, R1, R2, R4, and R5 run IS-IS with area number 49.0001, and R3 and R6 run IS-IS with area number 49.0002.





Inside AS 65000, R1, R3, R4, and R6 all establish IBGP neighbor relationships with R2 and R5, where R2 and R5 are Rs and R1, R4, R3, and R6 are clients. IBGP neighbor relationships are all established using the Loopback0 interface. R2 and R5 also establish an IBGI neighbor relationship. The IP address of the Loopback0 interface of each device is 10.0.X.X/32, and the Router ID is 10.0.X.X, where X is the device number. R1 and R4 introduce the external network 192.168.1.0/24 into BGP through import.

For 192.168.1.0/24, please match it according to the number of valid routes in the output information of "display bep routing-table".

98. The Link-LSA generated by an OSPFv3 router is shown in the figure.





Which of the following is the number of global unicast addresses configured on the interface?

99. By default, the time interval for sending OSPF Hello messages on P2P and Broadcast type interfaces is 10 seconds, and the neighbor expiration time is 40 seconds.

100. IPSG can defend against IP address spoofing attacks.

Which of the following descriptions of IPSG are wrong? (Multiple choice)

101. A network engineer provides a troubleshooting report after rectifying a fault. The actual network is simplified into the one shown in the figure, where R1 and R2 both have OSPF enabled, and function as the gateways of PC1 and PC2, respectively.





Given this, which of the following statements is false?

102. As shown in the figure, an administrator configures static LSP between routers R1~R4.





Which of the following configuration options are correct? (Multiple choice)

103. As shown in the figure, an enterprise hopes to achieve secure mutual visits between the headquarters and branches, as well as business isolation between the R&D area and the non-R&D area without changing the network deployment.





To meet this requirement, the administrator deploys BGP/MPLS IP VPN in the network.

Which of the following descriptions of this scenario are correct? (Multiple choice)

104. The Router ID of R1 is 10.0.1.1. In the LSDB of R1, the LSA shown in the figure is seen. The network engineer makes the following inferences based on the LSA.





Which one is wrong?

105. In the IS-IS network shown in the figure, R1 introduces the default route through the "default-route-advertise always level-1" command.





Which of the following descriptions is correct? (Multiple choice)

106. In the OSPF network shown in the figure, if the cost levels of the links are the same, load sharing is selected. If R1 turns on OSPF IP FRR, the main path for R1 to reach 10.0.3.3/32 is R1-R2-R3, and the backup path is R1-R4-R2-R3.

107. In the IS-IS network shown in the figure, the link cost value has been marked in the figure. R1 turns on IS-IS Auto FRR, then the main path for R1 to reach 10.0.3.3/32 is R1-R2-R3, and the backup path is R1-R4-R2-R3.

108. In the BGP/MPLS IP VPN network shown in the figure, the administrator uses Hub-spoke networking to implement centralized control of VPN traffic at the Hub site.





Which of the following RT value plans for each device is correct?

109. As shown in the figure, S73 is the user gateway and DHCP Relay in the network. The administrator plans to deploy the DHCP Snooping function on S73 to prevent DHCP attacks.





Which of the following commands does not need to be configured on ST3?

110. In the OSPFv3 network shown in the figure, area 1 is a stub area, area 2 is a common area, and area 3 is an NSSA area. The IPv6 address of the R5 Lopback0 interface is 2000::5/128, which is introduced into OSPFv3 through import. The Router ID of each device is 10.0.X.X, where X is the device number.





Which of the following descriptions is correct?

111. A network engineer is checking LLDP neighbor information on R1.





Which of the following descriptions are correct? (Multiple choice)

112. In the OSPFv3 network shown in the figure, the interconnected ports of R1, R2, and R3 have OSPFv3 enabled, and the Router ID of each device is 10.0.X.X, where x is the device number. Check the detailed information of a certain LSA on R3, and you can infer from the output information that R1 and R2 are DRs in the network.

113. BGP's prefix-based ORF (Outbound Route Filtering) capability can send the prefix-based ingress policy configured on the local device to the BGP neighbor through the route refresh message. The BGP neighbor constructs the egress policy based on these policies and filters the routes when they are sent. Compared with configuring the routing policy on the BGP neighbor, this method not only avoids the local device from receiving a large number of useless routes, reduces the CPU usage of the local device, but also effectively reduces the configuration work of the local device.

114. NetEngine AR can assign DHCP addresses to clients in the same network segment or different network segments from the router as a DHCP server.

Which of the following reasons will not cause the client to be unable to obtain the correct address?

115. In a BGP/MPLS IP VPN network, when which of the following routing protocols is running between CE and PE, the device can perform route redistribution operations without BGP?

116. An enterprise network deploys the MUX VLAN function to control the Layer 2 communication between employees and guests.





Which of the following descriptions are correct about the scenario shown in the figure? (Multiple choice)

117. On the network shown in the figure, EBGP peer relationships are established between neighboring routers through directly connected interfaces. The AS number is 6500X, where X is the number of the router. Both R1 and R4 have static routes to 192.168.1.0/24, which are imported to BGP through the import-route command.

By default, in the routing table of R3, which of the following is the AS_Path attribute carried in the route to 192.168.1.0/24?

118. As shown in the figure, in the OSFF network: Area 1 is the NSSA area, Area 2 is the common area, R4 introduces the external route 10.0.0.4/32, and the Router ID of each device is 10.0.X.X, where X is the device number.





The "asbr-summary 10.0.4.0 255.255.0" command is configured in the OSPF processes of R1 and R3.

Which of the following descriptions is correct?

119. MPLS needs to assign labels to messages in advance and establish an LSP before it can forward messages. LSP is divided into static LSP and dynamic LSP.

Which of the following protocols can be used to establish a dynamic LSP? (Multiple choice)

120. In the network shown in the figure, IS-IS IPv6 runs between R2, R6, and R3, and the IPv6 address of R6 Looback0 interface is 2000::6/128. Other links run OSPFv3, area 1 is a Stub area, and area 2 is an NSSA area.





IS-IS routes are imported into SPFv3 on R2 and R3.

Which of the following descriptions are correct? (Multiple choice)

121. In the OSPFv3 network shown in the figure, the interfaces of R1 and R2 both have two IPv6 addresses. Although the prefix lengths of the IPv6 addresses of R1 and R2 are different, they can still establish an OSPFv3 neighbor relationship. If R2 is the DR, then the Intra-Area-Prefix-LSA generated by R2 will contain four prefixes.

122. In the OSPF network shown in the figure, the network engineer found that the Router ID configuration of R1 and R2 is the same, and both R1 and R2 have introduced the default route (default-route-advertise always).





Which of the following descriptions of this scenario is wrong?

123. OSPF supports equal-cost load balancing. When the number of equal-cost routes in the network is greater than the number of equal-cost routes configured by the maximum load-balancing command, if the interface priority and interface index are the same, load balancing selects the route with a smaller next-hop IP address.

124. OSPF neighbors periodically send Hello messages to establish and maintain adjacency, and the interval of the Hello timer must be consistent, otherwise the adjacency cannot be established. In order to accelerate OSPF convergence, network engineers can set the interval of the Hello message to 1ms.

125. When there are multiple redundant links in the IS-IS network, multiple equal-cost routes may appear. For a certain route among the equal-cost routes, the network administrator can adjust its priority through the "nexthop xxxx weight value" command. The smaller the value, the higher the priority.

126. In the OSPFv3 network shown in the figure, area 1 is an NSSA area. R1 enters external route 2000::1/128 into OSPFv3.





By default, which of the following types of LSAs does not exist in area 1?

127. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The Router ID of each device is 10.0.X.X, and the AS number is 6500x, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. R1 adds the Community attribute value (1:1) when sending routes to its neighbors, and all routers in the network are enabled to transmit community attributes.





R2 and R3 are configured with routing policies that reject routes with a community attribute value of 1:1.

Which of the following is the path for traffic from R3 to 192.168.1.0/24?

128. When the hardware of a network device fails, you can usually use the replacement method, such as replacing the optical module, replacing the board, replacing the power module, etc. When performing the above operations, you need to wear an anti-static wrist strap.

129. I-SPF and PRC can improve the convergence speed of IS-IS routes. They both recalculate only the changed routes. The difference is that PRC does not need to calculate the node path, but updates the route based on the SPT calculated by I-SPF.

130. The OSPF protocol requires routers in the same area to save the same link state database LSDB. As the number of routes on the network continues to increase, some routers cannot carry so much routing information due to limited system resources. This state is called database overload.

If all routers in an OSPE network are configured with "Isdb-overf1low-limit number 7", which of the following scenarios may cause the router to enter the Overflow state? (Multiple choice)

131. An MPLS label is a 20-bit local identifier. Its label space is divided into special labels, static shared label space, and dynamic signaling protocol label space.

Which of the following are special labels? (Multiple choice)

132. In the Hub&Spoke network shown in the figure, in order to achieve correct routing transmission, the administrator must manually configure which of the following commands on the Hub-PE?

133. When traffic accesses the backbone network, VPN isolation is required. At this time, the interface configuration of a PE router is as shown in the figure.

If the administrator needs to bind the interface to VPN1 and the interface IP address remains unchanged, which of the following descriptions of the administrator's operation is correct?

interface GigabitEthernet 0/0/1

ip address 192168.100.2 24

134. In the OSPF network shown in the figure, the link cost value has been marked in the figure. R1 has enabled OSPF IP FRR and configured the "maximum load-balancing 1" command in the OSPF process.





Which of the following is the backup outbound interface for R1 to reach 10.0.3.3/32?

135. In the network shown in the figure, adjacent routers use directly connected interfaces to establish EBGP neighbor relationships. The AS number is 6500X, where X is the router number. R1 and R4 both have static routes to 192.168.1.0/24, which are introduced into BGP through import. The maximum number of equal-cost routes configured for EBGP load sharing on R3 is 8.





By default, the number of equal-cost routes from R3 to 192.168.1.0/24 is which of the following?