Which of the following statements about IS-IS (IPv4 6) is correct? (Multiple choice)

• A.Added TLV232236 to support IPv6 routing processing and calculation of IS-IS
• B.By default, IS-IS enables the multi-topology feature
• C.IS-IS works at the data link layer and only needs to add a new TLV to support IPv6
• D.In order to support the processing and calculation of IPv6 routes, IS-IS adds NLPID to 129 TLV

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A network engineer outputs the following information when troubleshooting OSPF faults. Based on this, it can be judged what causes the adjacency cannot be established normally?

• A.The IP address masks of the interfaces are inconsistent
• B.The interval between sending Hello packets is inconsistent
• C.Inconsistent area types
• D.Inconsistent authentication passwords

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As shown in the figure, Client1 and Client2 serve as clients of RR1 and RR2 at the same time. RR1 and RR2 are in the same Cluster, and R1 has entered 10 routes. It is assumed that BGP is configured correctly.

All neighbor relationships have been established. How many routing entries exist in the BGP routing table of Client2?

• A.20
• B.15
• C.0
• D.10

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An engineer uses 2 routers to test the IPV6 service, and runs the BGP4+ module to communicate with the branch. As shown in the figure, an engineer captures packets to view the Update message sent by R1. Which of the following statements is true about the description of the message information? (Multiple choice)

• A.The next hop address of the route described in this packet is: 2001
• B.The maximum length before the routing address described in this packet is: 2001
• C.This packet describes the currently withdrawn IPv6 route
• D.Only one BGP attribute is described in this packet: multi-protocol unreachable NLRI attribute

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Configuring DHCP Snooping can be used to prevent copycat attacks. Which of the following steps need to be included in the configuration process? (Multiple choice)

• A.Enable the global DHCP function
• B.Enable DHCP Snooping on an interface or VLAN
• C.Configure the interface trust state
• D.Enable the global DHCP snooping function

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