350-501 MPLS and Segment Routing Practice Question
Which label distribution protocol is replaced by segment routing in SR-MPLS deployments?
⚠ Common exam trap
Cisco often tests the misconception that segment routing replaces RSVP-TE for traffic engineering, but the question specifically asks about the label distribution protocol replaced by SR-MPLS, which is LDP, not RSVP-TE.
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
✓
LDP
In SR-MPLS deployments, segment routing replaces LDP as the label distribution protocol. LDP traditionally distributes labels for each prefix in the IGP, while segment routing uses the IGP itself to advertise prefix-SIDs and adjacency-SIDs, eliminating the need for a separate label distribution protocol. This simplifies the control plane and removes the dependency on LDP.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
RSVP-TE
Why it's wrong here
RSVP-TE is optional for TE.
- ✓
LDP
Why this is correct
Correct: SR replaces LDP.
- ✗
IGP itself
Why it's wrong here
IGP is used, not replaced.
- ✗
BGP
Why it's wrong here
BGP is still used for VPN labels.
Go deeper
Related to this question
About these practice questions
Courseiva writes every 350-501 question from scratch — 971 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
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.