4A0-105: Nokia Virtual Private LAN ServicesDemo

By Nokia · Question Mode

QuestionQ10

VPLS redundancy techniques

If facility-mode fast reroute takes place, how is the encapsulated frame size affected?

  • A No change
  • B Decrease by 4 bytes
  • C Increase by 4 bytes
  • D Increase by 2 bytes
  • E Decrease by 2 bytes
Explanation

Facility-mode MPLS fast reroute adds an outer MPLS label to steer the packet through the bypass tunnel while preserving the protected packet’s original label stack. Because each MPLS label-stack entry is 4 bytes, the encapsulated frame size increases by 4 bytes.

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