NO.27 After executing reset isis all, the IS-Is protocol process needs to be restarted and neighbors need to be re-established, and various IS-IS statistics will not be cleared.

NO.28 A certain park deployed both IPv4 and IPv6 networks for service testing, and IS-IS was run to achieve network interconnection. IS-IS routing protocol has good scalability and is widely used in existing networks.
Regarding IS-IS scalability, which of the following statements are correct? (Multiple choice)

NO.29 BGP authentication can prevent illegal routers from establishing neighbors with BGP routers. BGP authentication can be divided into ID5 authentication and Keychain authentication. Which of the followingBGP packets will carryBGPKeychain authentication information?

NO.30 Which of the following BGP routing attributes cannot control BGP routing?

NO.31 Which packets can Huawei devices perform traffic suppression for? (Multiple choice)

NO.32 In an MPLS network, SR running the DP protocol exchange LDP messages to realize functions such as neighbor discovery, session establishment and maintenance, and label management. In order to ensure the reliability of message delivery, all sending and receiving of LDP messages must be based on TCP connections.

NO.33 Network administrator A wants to use the IP Prefix List to match a specific route entry. Which of the following routes will Matched by the IIP Prefix List in the figure?

NO.34 (Multiple Choice) Which LSAs in OSPFv3 can be flooded in an area?

NO.35 From this figure, it can be known that

NO.36 In the intra-domain MPLS VPN network, when a data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description is wrong about the two layers of labels? (Multiple choice)

NO.37 Which of the following functions will affect BGP neighbor establishment? (Multiple choice)

NO.38 In the intra-domain MPLS VPN network, when the data packet enters the public network and is forwarded, it will be encapsulated with two layers of MPLS labels. Which of the following description of the two layers of labels is wrong?

NO.39 The configuration shown in the figure is performed on R2 to filter all received routes. Assuming that there is a BGP route with the AS_Path attribute of [100 200 300 400] on R1 that needs to be sent to R2, please help the network administrator to adjust the order of AS in the AS_Path attribute of the route on R1 to ensure that the routing entries will not be filtered by the routing policy of R2. (Sorting questions)

NO.40 In intra-domain MPLS VPN networks, data packets will be encapsulated with two layers of MPLS when they enter the public network and are forwarded.
Label, a description of the two-layer label in the following options. What is wrong is:

NO.41 As shown in the figure, OSPF is deployed in a campus, and Area 1 is deployed as an NSSA area. By default, R2 will automatically generate a Type 7 LSA default route and flood it in the NSSA area.

NO.42 An engineer uses two routers to test IPv6 services, and simulates the interconnection between the headquarters and branches by running BGP4+. As shown in the figure, an engineer captures the packet to view the update message sent by R1.


Regarding the description of the message information, which of the following statements is correct?

NO.43 How many bits are there in the label field of PLS?