The answer is that packets with label 101 will be swapped to label 201 and forwarded to 10.0.0.2. This is correct because the MPLS forwarding table entry for prefix 192.168.1.0/24 shows a local label of 101, which is the label assigned by this router, and an outgoing label of 201, which is the label that will be imposed on the packet before it is sent out GigabitEthernet0/0 to the next hop 10.0.0.2. The label stack contains only a single label (201), confirming a simple PHP (Penultimate Hop Popping) scenario where the upstream router performs the swap. On the Cisco CCNP ENARSI 300-410 exam, this output tests your ability to interpret the show mpls forwarding-table detail command, a core skill for verifying label-switched path operations. A common trap is confusing the local label (incoming) with the outgoing label—remember that the local label is what the router receives, and the outgoing label is what it sends. Memory tip: “Local is received, outgoing is sent; the next hop is where the label is spent.”
300-410 MPLS Operations Practice Question
This 300-410 practice question tests your understanding of mpls operations. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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 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}
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.
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.
✓
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.
Related concept
Read the scenario before looking for a memorised answer.
✗
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.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Trap categories for this question
Command / output trap
The output shows Label Stack {201}, which is a single label.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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 practitioner preparing for the 300-410 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
MPLS Operations — This question tests MPLS Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 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.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
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.
Last reviewed: Jun 18, 2026
Question Discussion
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