350-501 MPLS and Segment Routing Practice Question
In MPLS, what is the term for the operation where the top label is removed and replaced with a new label?
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
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Swap
Swap is the operation where the incoming label is replaced with a new outgoing label, as determined by the LFIB.
Answer analysis
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- ✓
Swap
Why this is correct
Correct. Swap replaces the top label with a new label.
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Push
Why it's wrong here
Push adds a new label onto the stack.
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Pop
Why it's wrong here
Pop removes the top label.
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Replace
Why it's wrong here
Not a standard MPLS term.
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