QUESTION: 101

Which of the following statements regarding the inter-AS MPLS VPN are false?

In inter-AS VPN Option B mode, an MP-EBGP peer relationship needs to be established between two ASBRS.
In inter-AS VPN Option B mode, two ASBR-Pes are interconnected through multiple interfaces (including sub-interfaces), each interface is associated with one VPN, and each ASBR-PE considers the remote device as a CE.
In inter-AS VPN Option A mode, the routes advertised between two ASBRs are common IPv4 routes.
In inter-AS VPN Option C solution 2, if only LDP is used to advertise public network labels, three labels need to be used during packet forwarding.

Answer(s): D

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QUESTION: 102

Which of the following statements regarding LDP reliability is false?

By default, the policy for manually configuring LDP FRR specifies that backup routes with 32-bit addresses should trigger the setup of a backup LDP LSP.
Synchronization between LDP and IGP requires suppression of IGP route advertisement to achieve consistent LDP and IGP.
LDP FRR can generate an LSP as the backup of the primary LSP based on Label Mapping messages that are not from the optimal next hop. LDP FRR establishes forwarding entries for the backup LSP.
LDP Graceful Restart (GR) leverages the separation of the forwarding plane and control plane by MPLS to ensure uninterrupted traffic transmission during a protocol restart or active/standby switchover.

Answer(s): A

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QUESTION: 103

The display mpls lsp command is run on a router to check LSP information. The command output is as follows:

Which of the following statements is true?

When sending a data packet with the destination IP address 4.4.4.4, the router sends it directly without any label added.
After receiving a data packet with label 1024, the router changes the label to label 1027 and then sends the packet.
When sending a data packet with the destination IP address 2.2.2.2, the router sends it directly without any label added.
When sending a data packet with the destination IP address 3.3.3.3, the router adds label 1026 to the packet before sending it.

Answer(s): A

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If PIM-SM is enabled on a multicast network, only after multicast tress are established between the multicast source and receivers, the receiver can receive multicast data. Which of the following statements regarding the trees are true?

An RPT is established between the RP and receivers.
An SPT is established between the RP and receivers.
An SPT is established between the multicast source and RP.
An RPT is established between the multicast source and RP.

Answer(s): A,C

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QUESTION: 104