350-501 MPLS and Segment Routing Practice Question
A service provider is migrating from LDP to SR-MPLS. Which mechanism allows a router to allocate labels for prefixes using both LDP and SR simultaneously during the migration?
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
✓
Segment Routing Mapping Server (SRMS)
Cisco's SR/LDP interworking allows coexistence. Routers can run both LDP and SR, and a mapping server advertises SR labels for LDP-learned prefixes. This enables seamless migration.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
LDP over SR tunnel
Why it's wrong here
Not the primary mechanism.
- ✗
RSVP-TE interworking
Why it's wrong here
Not relevant.
- ✗
MPLS forwarding plane adjustment
Why it's wrong here
Not a specific feature.
- ✓
Segment Routing Mapping Server (SRMS)
Why this is correct
Correct.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 350-501 practice question is part of Courseiva's free Cisco certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the 350-501 exam.