On a VPLS network a PE router receive a packet that containers layer 2 user data from a PE. How does the PE router determine the source VSI of this packet?

• A.Inner label of the packet
• B.Destination MAC address in the L2 PDU encapsulation in the packet
• C.Outer label of the packets
• D.MAC address and VLAN ID in the PDU encapsulated in the packet

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Which of the following statements about the fault notification in VLL FRR are true?

• A.The primary PW is carried over an LDP LSP tunnel on the public network side and BFD for LDPLSP (detection interval: 30 ms) is enabled on the LDP LSP tunnel. If a forwarding fault occurs on the public network side of an LSP tunnel, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.
• B.A forwarding fault occurs on the public network side of the primary PW. If BFD for PW is not enabled on the primary PW, the L2VPN cannot perceive the fault on the PSN side and therefore PW switching is not triggered.
• C.The primary PW is carried over a GRE tunnel on the public network side and BFD for PW (detection interval: 30 ms) is enabled on the GRE tunnel. If a forwarding fault occurs on the PSN side of the primary PW, BFD cannot detect the fault because the PW is carried over a GRE tunnel. In this case, the L2VPN needs to detect the fault itself and triggers PW switching.
• D.A forwarding fault occurs on the public network side of the primary PW. If BFD for PW (detection interval: 300 ms) is enabled on the primary PW, BFD fast detects the fault and sends a notification to the L2VPN for PW switching.

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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.Filter all CE packets that use the VRF interface address as the destination address based on the ACL rule.
• C.uRPF
• D.VRF route capacity limitation

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Exhibit:

The preceding information shows the configurations of Ethernet 6/1/1 and ensure created based on received IGMPv2 Report messages. Which action does Ethernet 6/1/1 after receiving Leave messages for group 224.1.2.3?

• A.Deletes the record of group 224.1.2.3
• B.Sends group-specific query messages for group 224.1.2.4

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On the IP bearer network, which of the following methods can be used to manage devices on the backbone network and switches on the signaling VPN?

• A.Leak public and private network routes to manage devices on the public and private networks.
• B.Establish a physical or logical link with the PE and mount MCEs to the PE to manage devices on the public and private networks.
• C.Establish two physical or logical links with the PE to manage devices on the public and private networks. One link belongs to the public network and the other belongs to the private network.
• D.Construct an outband NM network to manage all devices.

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