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Free 4A0-103 Exam Braindumps
Nokia Multiprotocol Label Switching Questions 66–70 (page: 15)

Updated On: 9-Feb-2026
Page 15 of 51
PDF with 256 Questions

Which of the following describes what happens when facility backup fast reroute is enabled for a LSP? Choose three answers.

  1. Each PLR will signal a bypass tunnel that avoids the next-hop node or link.
  2. When a failure occurs, the PLR will push an additional label onto the label stack and start forwarding traffic onto its bypass tunnel.
  3. The ingress router will include a RRO object in the path message to indicate the routers that should be PLRs and MPs along the protected path.
  4. The ingress router will set the local protection desired flag in the session attribute object of the path message to inform all routers along the protected LSP path to establish bypass tunnels.
  5. When the bypass tunnel is in use, the MP will include the RRO object in its PathErr message, with the local protection in use flag set to notify the ingress router that it is using the bypass tunnel.

Answer(s): A,B,D



True or False? MPLS may use an existing data link layer header field to identify a label, instead of using a specific MPLS header

  1. TRUE
  2. FALSE

Answer(s): A



Which one of the following statements regarding the detour object transported in the detour path message is true?

  1. The PLR sends it downstream with the RRO.
  2. The PLR sends it downstream with the ERO.
  3. It associates all detours with the source PLR.
  4. The MP sends it upstream with the RESV message.

Answer(s): B



What MPLS function should be performed by a router that receives a data packet containing an MPLS label value of 3?

  1. A router will never receive a packet containing this label value.
  2. Request a new label from the peer that provided this label.
  3. Pop the label.
  4. PUSH an additional label onto the label stack.
  5. Signal a new label to the peer that sent the packet.

Answer(s): A



Which of the following is described by the following statement? An LSR propagates a label mapping only for an FEC for which it has a label mapping for the FEC next-hop.

  1. Independent control mode.
  2. Ordered control mode.
  3. Liberal label retention.
  4. Conservative label retention.
  5. Downstream on demand

Answer(s): B



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