Alcatel-Lucent 4A0-105 Exam (page: 6)
Alcatel-Lucent 4A0-105 Virtual Private LAN Services
Updated on: 15-Feb-2026

Viewing Page 6 of 33

What scaling factors should a network engineer be aware of when designing VPLS networks? (Choose three.)

  1. Control plane scaling.
  2. Data plane scaling.
  3. Network touches.
  4. Route table reduction.
  5. OAM tools.

Answer(s): A,B,C



When a PE node receives a PBB encapsulated frame on a B-VPLS, how does the PE determine which l-VPLS it belongs to?

  1. The l-TAG in the l-SID is inspected to determine where the frame should be delivered.
  2. When the B-MAC header is stripped the customer MAC address is then looked up in the FDB
  3. The l-SID in the l-TAG is inspected to determine where the frame should be delivered.
  4. The PE inspects the service label in the MPLS header before stripping the B-MAC header.

Answer(s): C



Click on the exhibit below.

How many LSPs are required in total between Metro A and Metro B if 100 hierarchical VPLS services are deployed across the two metro networks?

  1. 100
  2. 200
  3. 1
  4. 2

Answer(s): D



If the max remote-age timer of a B-VPLS is reached, what happens to the remotely learned MAC addresses in the l- VPLS service?

  1. There is no effect. The MAC addresses for the l-VPLS age out independently of the aging of B-VPLS addresses.
  2. The MAC addresses for the l-VPLS will age out immediately following the remote-age out of the backbone-macs of the B-VPLS.
  3. By default, the remote-age timer of the B-VPLS is configured to 0 and addresses do not age out. The l-VPLS uses its own timer.
  4. The same timer is used for B-VPLS and l-VPLS addresses on the node.

Answer(s): B



Which element of IEEE 802.1ag is responsible for initiating CFM messages?

  1. MEP
  2. MAP
  3. MIP
  4. MUP

Answer(s): A



Viewing Page 6 of 33



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