Regarding the way the device handles packets in the MPLS network model, which of the following description is wrong? (Multiple Choice)

• A.LSR must not strip labels.
• B.The device discards the IP packets entering the MPLS domain.
• C.The label forwarding path LSP is determined and established through various protocols during the forwarding of the packet.
• D.Both LER and LSR will carry out label distribution.

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When there are multiple matching rules in the ACL of the VRP, which of the following statements is correct about the matching order?

• A.On confirmation, match the order by matching the permit first and then matching the deny.
• B.On confirmation, follow the Rule-ID, match from small to large
• C.There is only one matching order and cannot be modified.
• D.By default, match according to the principle of “depth first”

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The OSPF protocol is running on a company network. To understand the OSPF mechanism to perform packet capture operations on the network, which of the following description about the OSPF packet is correct? (Multiple Choice)

• A.Sending Hello packets immediately after the interface joins the OSPF area.
• B.The LS Update message is sent only when the adjacency is established.
• C.After receiving the LS Update message, the router must send LS Ack to confirm.
• D.LS Update message synchronizes the link state database by sending detailed LSA information.

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Which of the following is correct about the ISIS LSP fragmentation extension?

• A.The maximum number of fragments that an ISIS router can generate is 1024.
• B.Enable the ISIS router to generate more LSP fragments to carry more ISIS information.
• C.ISIS fragmentation extensions are achieved by adding virtual systems, which can be expanded to a maximum of 1000 virtual systems.
• D.ISIS fragmentation extensions are equally valid for Hello packets.

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As shown in the figure, in the hub&spoke multicast mode of MPLS bgp VPN, in order to realize that the branch can only communicate with the headquarters, the branches cannot communicate with each other. Which of the following schemes can the RT be set?

• A.Headquarters: Import Target: 12:3 Export Target: 12:3 Branch 1: Import Target: 12:3 Export Target: 12:3 Branch 2: Import Target: 12:3 Export Target: 12:3
• B.Headquarters: Import Target: 2:2 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2
• C.Headquarters: Import Target: 1:1 Export Target: 3:3 Branch 1: Import Target: 3:3 Export Target: 1:1 Branch 2: Import Target: 3:3 Export Target: 2:2
• D.Headquarters: Import Target: 12:3 Export Target: 3:12 Branch 1: Import Target: 3:12 Export Target: 12:3 Branch 2: Import Target: 3:12 Export Target: 12:3

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