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Which statement about primary VPN tunnel binding is false?

A. Only the data destined for the specific peer device is transmitted through the n=bound primary VPN tunnel Data to other devices is transmitted using the default tunnel policy.

B. Primary tunnel ensures that data can be transmitted from a VPN t a specific peer device permanently through a dedicate TE tunnel.

C. Primary VPN tunnel binding means to bind a tunnel to a specific VPN. The bound tunnel is exclusive to the VPN.

D. The bound primary tunnel can be selected sequentially.

Which of the following statements about the working principle of LDP FRR are true?

A. After LDP FRR is enabled, a backup LSP is generated. Both the primary and backup LSPs are stored in the forwarding table.

B. LDP FRR can be deployed on the ingress node and the intermediate node.The primary and backup LSPs are recorded in the ILM table on the intermediate node and in the FIB table on the ingress node.

C. Multiple LSPs can be backed up on the ingress node, that is, entries about multiple backup LSPs are generated in the forwarding table according to the priority of the LDR FRR, implementing multilayer protection.

D. After LDP FRR is enabled, a backup LSP can be generated for a primary LSP to prevent serious packet loss during fast flapping of the primary LSP

Which of the following statements about control words in the L2VPN are true?

A. When SVC VLL is used, if PEs at two ends of a VC use different control words, the may not become Up.

B. When Martini VLL is used, if PEs at two ends of a virtual connection (VC) use different control words, the VC may not become Up

C. The control word can be used to identically the packet sequence.

D. A control word generally has two bytes and can ne extended to four bytes.

E. The control word can be used for packet padding For example, when the public network uses Ethernet and the AC uses Peer-to-protocol (PPP), control words can be used to transfer and identify PPP packet with a bytes.

On the MPLS Layer 3 VPN, PE security is key to the safety of the entire network. Which of the following security measures can be deployed on PEs?

A. PE-CE route protocol authentication

B. VRF route capacity limitation

C. uRPF

D. Filter all CE packets that use the VRF interface address as the destination address based on the ACL rule.

Which of the following methods can be used to ensure loop-free and reachable Martini VPLS links?

A. Split horizon

B. Poison reverse

C. Spanning tree algorithm

D. Full-meshed PEs