mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to verify MPLS LDP…
A network engineer runs the following command to verify MPLS LDP discovery sources:
R1# show mpls ldp discovery detail
Output: Local LDP Identifier: 10.0.0.1:0 Discovery Sources:
Interfaces:
GigabitEthernet0/0 (hello interval 5 s, targeted hello interval 10 s) LDP Id: 10.0.0.2:0, transport address: 10.0.0.2 Hold time: 15 s (local: 15, peer: 15) GigabitEthernet0/1 (hello interval 5 s, targeted hello interval 10 s) LDP Id: 10.0.0.3:0, transport address: 10.0.0.3 Hold time: 15 s (local: 15, peer: 15)
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
✓
R1 has discovered two LDP neighbors via link hellos on two different interfaces
The output shows LDP discovery sources. R1 has discovered two LDP neighbors via link hellos on interfaces GigabitEthernet0/0 and GigabitEthernet0/1. Both neighbors have a hold time of 15 seconds.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
R1 has discovered two LDP neighbors via link hellos on two different interfaces
Why this is correct
The output shows two interfaces with LDP neighbors discovered via link hellos.
- ✗
R1 is using targeted hellos only
Why it's wrong here
The discovery sources are interfaces, indicating link hellos, not targeted.
- ✗
R1 has no LDP neighbors
Why it's wrong here
Two neighbors are listed.
- ✗
The LDP session with 10.0.0.2 is down
Why it's wrong here
The neighbor is listed in discovery, so the session is likely up.
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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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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