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Exam 300-410 topic 1 question 522 discussion

Actual exam question from Cisco's 300-410
Question #: 522
Topic #: 1
[All 300-410 Questions]

Which technique removes the outermost label of an MPLS-tagged packet before the packet is forwarded to an adjacent LER?

  • A. explicit-null
  • B. PHP
  • C. label swap
  • D. label imposition
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Suggested Answer: B 🗳️
by RouterToRooter at Dec. 6, 2023, 8:55 a.m.

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RouterToRooter
Highly Voted 1 year, 8 months ago
Selected Answer: B
Penultimate hop popping (PHP) is a function performed by certain routers in an MPLS enabled network. It refers to the process whereby the outermost label of an MPLS tagged packet is removed by a label switch router (LSR) before the packet is passed to an adjacent label edge router (LER).
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