mediumMultiple ChoiceObjective-mapped
300-410 Practice Question: Runs the following command to verify MPLS…
A network engineer runs the following command to verify MPLS forwarding:
R1# show mpls forwarding-table 192.168.1.0 255.255.255.0 detail
Output: Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface 101 201 192.168.1.0/24 0 Gi0/0 10.0.0.2 MAC/Encaps: 14/18, MTU: 1500, Label Stack {201}
No output feature configured
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
✓
Packets with label 101 will be swapped to label 201 and forwarded to 10.0.0.2
The output shows the MPLS forwarding table entry for prefix 192.168.1.0/24. The local label is 101, outgoing label is 201, next hop is 10.0.0.2 via GigabitEthernet0/0. The label stack contains only label 201.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Packets with label 101 will be swapped to label 201 and forwarded to 10.0.0.2
Why this is correct
The forwarding table shows label swap operation: incoming label 101 swapped to outgoing label 201.
- ✗
Packets with label 101 will be popped and forwarded as IP packets
Why it's wrong here
The outgoing label is 201, not implicit null (label 3), so label is not popped.
- ✗
The prefix 192.168.1.0/24 is directly connected
Why it's wrong here
The outgoing interface is Gi0/0 with next hop 10.0.0.2, indicating it is not directly connected.
- ✗
The label stack has two labels
Why it's wrong here
The output shows Label Stack {201}, which is a single label.
Quick reference
Access Control Model Comparison
| Model | Acronym | Who Controls Access? | Best For |
|---|---|---|---|
| Discretionary Access Control | DAC | Resource owner | Small teams, file shares |
| Mandatory Access Control | MAC | System / security labels | Classified govt / military |
| Role-Based Access Control | RBAC | Administrator (via roles) | Enterprise environments |
| Attribute-Based Access Control | ABAC | Policy engine (user + resource attributes) | Fine-grained, dynamic policies |
| Rule-Based Access Control | RuBAC | System rules / ACLs | Firewall rules, network ACLs |
Go deeper
Related to this question
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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.
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Variation 1. A network engineer runs the following command on Router R1: R1# show mpls forwarding-table Local Outgoing Prefix Bytes Label Outgoing Next Hop Label Label or Tunnel Id Switched interface 16 Pop Label 10.1.1.0/24 0 Gi0/0 192.168.1.2 17 21 10.2.2.0/24 1500 Gi0/0 192.168.1.2 18 Untagged 10.3.3.0/24 0 Gi0/1 192.168.2.2 Based on this output, what is the problem with the label entry for 10.3.3.0/24?
hard- A.The label 18 is being swapped correctly.
- B.The prefix 10.3.3.0/24 is being forwarded with MPLS label 18.
- ✓ C.The next-hop router 192.168.2.2 is not an LDP neighbor for this prefix.
- D.The label 18 is being popped by the next-hop router.
Why C: The entry for 10.3.3.0/24 shows 'Untagged' in the outgoing label column, meaning the router is forwarding IP packets without an MPLS label. This indicates that the next-hop router (192.168.2.2) did not assign a label for this prefix, possibly because LDP is not enabled on that interface or the neighbor is not an LDP peer.
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.