Exhibit.

As shown in the figure, RTA and have one BGP session. To detect fault fast,the BFD for BGP feature needs to
be configured on RTA and RTB. BGP-related configurations are as follows:

The only Ethernet link between RTA and RTB becomes faulty when the BGP neighbor session is in
ESTABLISHED state and the BFD session is in the UP state. Which statements is true? (Note: BFD works in
asynchronous mode)

• A.RTA and RTB detect the fault simultaneously.
• B.The BGP session between RTA and RTB is interrupted when the BGP hold time (time duration is 180s
  by default) express.
• C.RTA detect the fault faster than RTB.
• D.RTB detect the fault faster than RTA.

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Exhibit.

As shown in the figure, one enterprise has VPN A, the other has VPN B, and the two VPNs each have two
CEs. The following requirements needs to be met.
VPNA-CA 1 can interwork with VPNA-CE 2
2>VPNA-CE 1 can interwork with VPNA-CE 2.
The figure shows the types of links between CEs and PEs and the IDs used in Martini mode. Which the
following VC ID configurations are correct?

• A.VCID1 =2, VCID2 = 2, VCID3 =2, VCID4 +2
• B.VCID1 =1, VCID2 = 2, VCID3 =3, VCID4 +4
• C.VCID1 =1, VCID2 = 1, VCID3 =2, VCID4 +2
• D.VCID1 =1, VCID2 = 2, VCID3 =1, VCID4 +2

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Which statement about the MPLS LSP traceroute is true?

• A.The downstream mapping TLV is used to carry downstream information of the correct node.
• B.Echo request route sends by the LSP traceroute can cay multiple downstream mapping TLVs.
• C.The egress route sends back an reply packet containing the downstream mapping TLV if the receives
  Echo request contains the downstream mapping TLV.
• D.The destination IP address ifan Echo request sent by the LSPtraceroute is the IP address of the
  corresponding FEC.

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On the IP bearer network, different VPN users (VPN A and VPN B) must access the internet through the same egress. Which of the following schemes can achieve security isolation VPNs and have the best scalability?

• A.Option C
• B.Option D
• C.Option A
• D.Option B

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Interface Ethernet 3/1/0 is configured as follows:

Ethernet 3/1/0 receives multicast group 232 0.0.31 IGMFV2 Report messages, If no multicast traffic sent to group 232.0.31 can be detected on Ethernet 3/1/0, which of the following causes may be true?

• A.The multicast border of group 232 0.0.31 is configured on Ethernet 3/1/0.
• B.SSM mapping is not configured for group 232 0 0 31.
• C.Ethernet 3/1/0 does not function as a PIM DR
• D.The TTL value is less than 20 in data messages sent to group 232.0.0.31.

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