The correct interpretation is that the router has a local label of 101 for the prefix and has learned two remote labels from two different neighbors. This output from the `show mpls ldp bindings` command displays the Label Information Base (LIB) entry for the FEC 10.10.10.0/24, where the local binding shows the label this router will impose when forwarding packets for that prefix, while each remote binding lists a label advertised by a specific LDP neighbor (identified by LSR ID and label space). For the Cisco CCNP ENARSI 300-410 exam, this question tests your ability to differentiate between local and remote label bindings—a common trap is confusing the local label (what you assign) with remote labels (what you receive from peers). Remember that a router can learn multiple remote labels for the same FEC from different LDP neighbors, which is normal for building a complete label forwarding table. A useful memory tip: "Local is mine, remote is thine" — the local label is what you push, remote labels are what your neighbors tell you to use.
300-410 Device Access Control Practice Question
This 300-410 practice question tests your understanding of device access control. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A network engineer runs the following command to troubleshoot a Device Access Control issue:
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 a local label of 101 for the prefix and has learned two remote labels from two different neighbors.
The output of 'show mpls ldp bindings 10.10.10.0 24' displays the Label Information Base (LIB) entry for prefix 10.10.10.0/24. The 'local binding: label: 101' indicates that this router has assigned label 101 to the prefix. The two 'remote binding' lines show that two different LDP neighbors (LSR IDs 10.1.1.2 and 10.1.2.2) have advertised labels 102 and 103 respectively for the same prefix. This is the normal operation of LDP, where a router learns multiple remote labels for the same FEC from different peers.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
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 a local label of 101 for the prefix and has learned two remote labels from two different neighbors.
Why this is correct
The output clearly shows one local binding and two remote bindings from different LSRs.
Related concept
Read the scenario before looking for a memorised answer.
✗
The router has only a local label of 101; the remote bindings are not used because they are from the same LSR.
Why it's wrong here
The remote bindings are from two different LSRs (10.1.1.2 and 10.1.2.2), not the same.
✗
The label 102 is the local label for the prefix 10.10.10.0/24.
Why it's wrong here
The local binding is label 101; label 102 is a remote binding from LSR 10.1.1.2.
✗
The router has no label for the prefix because the lib entry is incomplete.
Why it's wrong here
The lib entry is complete with both local and remote bindings; the prefix has a label.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between local and remote bindings in the LIB, and the trap here is that candidates may confuse the 'local binding' with a remote label or assume that multiple remote bindings from different LSRs are not used, when in fact they are all valid entries for potential forwarding paths.
Detailed technical explanation
How to think about this question
In MPLS LDP, the LIB stores all label bindings learned from all neighbors, while the LFIB (Label Forwarding Information Base) stores only the best label(s) used for actual forwarding. A router may have multiple remote bindings for the same FEC from different peers, which allows for load balancing or fast reroute (FRR) scenarios. The 'show mpls ldp bindings' command is a critical troubleshooting tool to verify that label exchange has occurred correctly between LDP peers.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A network engineer at a university connects two campus buildings via a fibre link. Both routers run OSPF, but no adjacency forms — even though both routers can ping each other. The engineer finds one router is in area 0 and the other in area 1. OSPF adjacency requires matching area numbers, hello/dead timers, and network type. IP reachability alone is not enough.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Device Access Control — This question tests Device Access Control — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The router has a local label of 101 for the prefix and has learned two remote labels from two different neighbors. — The output of 'show mpls ldp bindings 10.10.10.0 24' displays the Label Information Base (LIB) entry for prefix 10.10.10.0/24. The 'local binding: label: 101' indicates that this router has assigned label 101 to the prefix. The two 'remote binding' lines show that two different LDP neighbors (LSR IDs 10.1.1.2 and 10.1.2.2) have advertised labels 102 and 103 respectively for the same prefix. This is the normal operation of LDP, where a router learns multiple remote labels for the same FEC from different peers.
What should I do if I get this 300-410 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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