mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to troubleshoot a…
A network engineer runs the following command to troubleshoot a Network Logging and Syslog issue:
R1# show mpls ldp neighbor detail
Output: Peer LDP Ident: 10.0.0.2:0, Local LDP Ident: 10.0.0.1:0 TCP connection: 10.0.0.2.646 - 10.0.0.1.646 State: Oper; Msgs sent/rcvd: 100/100; Downstream Up time: 00:10:00 LDP discovery sources: GigabitEthernet0/0, Src IP addr: 10.0.0.2 Addresses bound to peer LDP Ident:
10.0.0.2 10.1.1.2 10.2.2.2
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
✓
The router has an operational LDP session with neighbor 10.0.0.2, with addresses 10.0.0.2, 10.1.1.2, and 10.2.2.2.
The output shows detailed LDP neighbor information, including TCP connection details, state, and addresses bound to the peer. This indicates a functioning LDP session.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
The router has an operational LDP session with neighbor 10.0.0.2, with addresses 10.0.0.2, 10.1.1.2, and 10.2.2.2.
Why this is correct
The state is 'Oper' (operational) and addresses are listed.
- ✗
The router is experiencing an LDP authentication failure.
Why it's wrong here
No authentication errors are shown.
- ✗
The router is using UDP for LDP discovery.
Why it's wrong here
LDP discovery uses UDP, but the session uses TCP; the output shows TCP connection.
- ✗
The router has only one LDP neighbor.
Why it's wrong here
The output shows only one neighbor, but does not indicate if there are others.
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Related to this question
Learn chapter
Introduction to ENARSI Exam and Network Fundamentals
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.
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.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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