mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to debug MPLS LDP…
A network engineer runs the following command to debug MPLS LDP label advertisements:
R1# debug mpls ldp labels
Output:
*Mar 1 00:01:23.456: LDP: Sent label mapping for 192.168.1.0/24, label 101 *Mar 1 00:01:23.789: LDP: Received label mapping for 192.168.2.0/24, label 201 *Mar 1 00:01:24.012: LDP: Sent label mapping for 10.0.0.0/8, label 102 *Mar 1 00:01:24.345: LDP: Received label mapping for 10.0.0.0/8, label 202
What does this output indicate?
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 label bindings are being exchanged between R1 and its LDP neighbor
The debug output shows label mappings being exchanged between LDP peers. R1 is sending its own label bindings (e.g., label 101 for 192.168.1.0/24) and receiving label bindings from its neighbor (e.g., label 201 for 192.168.2.0/24).
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 label bindings are being exchanged between R1 and its LDP neighbor
Why this is correct
The output shows both sent and received label mappings, indicating successful exchange.
- ✗
R1 is only receiving label mappings, not sending any
Why it's wrong here
The output shows R1 sending label mappings as well.
- ✗
The LDP session is down
Why it's wrong here
Label mappings are being exchanged, so the session is up.
- ✗
R1 is using implicit null label for 10.0.0.0/8
Why it's wrong here
The output shows label 102 being sent, not implicit null (label 3).
Go deeper
Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
Key term
MPLS Label Distribution
MPLS Label Distribution is the process by which routers exchange labels that tell them how to forward packets across a network without looking at the IP address each time.
Key term
LDP Protocol
LDP, or Label Distribution Protocol, is a protocol that routers use to automatically exchange labels that enable MPLS (Multiprotocol Label Switching) to create fast, efficient paths for data packets across a network.
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JA
Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This 300-410 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 300-410 exam.