350-501 MPLS and Segment Routing Practice Question
In SR-MPLS TE, a headend router is configured with an SR Policy that includes an explicit candidate path with segment list [16001, 16003]. What do these numbers represent?
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
MPLS label values representing Node SIDs or Adjacency SIDs
In SR-MPLS, segment lists are composed of MPLS labels. Node SIDs are typically from the SRGB (e.g., 16001 could be a Node SID for a router). Adjacency SIDs would be link-specific labels. The numbers are labels, not interface indices or metric values.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
MPLS label values representing Node SIDs or Adjacency SIDs
Why this is correct
Correct: Segment lists contain MPLS labels.
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Interface indices
Why it's wrong here
Interface indices are not used in segment lists.
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Metric values for path calculation
Why it's wrong here
Metrics are not part of segment list.
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IPv4 addresses encoded as numbers
Why it's wrong here
IPv4 addresses are not encoded as plain numbers in segment lists.
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