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Free 4A0-115 Exam Braindumps (page: 4)

Page 3 of 11
PDF with 40 Questions

Based on the exhibit below, which of the following statements is FALSE?



When forwarding BUM traffic, the local PE must replicate the traffic and send it as unicast to the advertising neighbor.

  1. The MPLS label 524284 presented indicates the service label value that the neighbor 10.10.10.2 uses to forward BUM traffic to PEI.
  2. When forwarding BUM traffic, the local PE uses an MPLS transport tunnel towards the advertising neighbor.
  3. The IMET route is imported by a local VPLS configured with a route-target value of 65100:10.

Answer(s): A

Explanation:

When forwarding BUM traffic, the local PE does not replicate the traffic and send it as unicast to the advertising neighbor. Instead, the local PE uses an MPLS transport tunnel towards the advertising neighbor and sends the traffic with an MPLS label that indicates the service.



Based on the exhibit below, which of the following statements is TRUE?

  1. PE2 advertises this BGP update for a locally-configured VPWS service.
  2. PEI uses this BGP update to build the flooding list of the associated service.
  3. PEI uses MPLS label 524284 when sending traffic destined to
  4. Neighbor 10.10.10.2 is connected to a multi-homed CE.

Answer(s): B

Explanation:

PE1 uses this BGP update to build the flooding list of the associated service. The update contains an IMET route that indicates that neighbor 10.10.10.2 is participating in a VPLS service with a network identifier of 10.



Based upon the exhibit, which of the following statements is FALSE?

  1. PEI populates this information into the local VPLS FDB.
  2. Neighbors 10.10.10.2 and 10.10.10.3 have proxy-ARP enabled for the VPLS.
  3. Neighbors 10.10.10.2 and 10.10.10.3 have a service that uses a network identifier of 10.
  4. PEI uses VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3.

Answer(s): D

Explanation:

PE1 does not use VXLAN tunnels to reach neighbors 10.10.10.2 and 10.10.10.3. PE1 uses MPLS tunnels to reach these neighbors, as indicated by the MPLS label values in the output.



A Proxy-ARP/ND is operational for a VPLS.
Which of the following statements is FALSE?

  1. The PE has proxy-ARP and dynamic-populate enabled for the VPLS.
  2. The proxy-ARP table is populated by snooping IP packets received from remote PEs.
  3. When the PE learns a local host IP address, it adds an entry into its proxy-ARP table.
  4. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.

Answer(s): C

Explanation:

When the PE learns a local host IP address, it does not add an entry into its proxy-ARP table. The proxy-ARP table is populated by snooping IP packets received from remote PEs. The PE advertises a MAC/IP route that includes the MAC and IP address of a local host.






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