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Alcatel-Lucent 4A0-105 Exam
4A0-105 Virtual Private LAN Services (Page 2 )

Updated On: 7-Feb-2026
Page 2 of 40
PDF with 193 Questions

Which of the following technologies allows for two explicit VLAN tags to be received from a customer device?

  1. RSVP-TE
  2. SP-VLAN
  3. QinQ
  4. Dot1Q

Answer(s): C



What is the SA in the Ethernet frame used for by a layer 2 switch?

  1. MAC learning
  2. SA filtering
  3. Routing table population
  4. Frame forwarding

Answer(s): A



What are the limitations of a traditional layer 2 switch? (Choose 3}

  1. Isolates collision domains.
  2. Requires layer 2 loop prevention.
  3. Slow response to topology changes.
  4. Limited to 4094 vlans per switch.
  5. Increased flooding.

Answer(s): B,C,D



Which of the following statements about the VC-ID is false?

  1. The vc-id is signaled in the control plane.
  2. The vc-id is part of the data plane encapsulation.
  3. There is a vc-id to vc-label mapping.
  4. The vc-id has point to point significance.

Answer(s): B



Assuming TLDP and RSVP are both being used in an MPLS network core which of the following statements is true?

  1. TLDP is used to create the inner label, RSVP is used to create the outer label.
  2. TLDP is used to create the outer label, RSVP is used to create the inner label.
  3. TLDP and RSVP cannot be used in the same network since they both provide the same label.
  4. When RSVP is used, TLDP must be disabled and static vc labels should be used.
  5. TLDP and RSVP can be used to create either labels based on how they are configured.

Answer(s): A






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