- A
The 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3.
SNMPv2c does not support informs; it only supports traps. Informs require SNMPv3. The configuration uses v2c, so no informs are sent.
- B
The NMS is not configured to send SNMP responses to informs.
Why wrong: This would cause the router to send informs but not receive responses, but the statistics show 0 sends, so the router is not even trying.
- C
The firewall is blocking UDP 162 from the NMS to the router.
Why wrong: Informs are sent from the router to the NMS on UDP 162, and the firewall allows that. The response would be on a high port, but the router is not sending.
- D
The router's SNMP agent is not enabled due to a missing 'snmp-server' command.
Why wrong: The router has 'snmp-server enable traps' and the host command, so the agent is enabled.
Quick Answer
The answer is that SNMP inform requests are not supported with SNMPv2c, so the router will never send them despite the configuration. SNMP informs require an acknowledgment from the NMS and are only available with SNMPv3, which provides the necessary security and confirmation mechanisms; SNMPv2c only supports unacknowledged traps. On the Cisco CCNP ENARSI 300-410 exam, this tests your understanding of SNMP version limitations and the subtle difference between traps and informs—a common trap is assuming the ‘informs’ keyword alone enables the feature, but the router silently ignores the command if the version doesn’t support it. Remember the memory tip: “Informs need a handshake, so only v3 can shake hands.”
300-410 SNMP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of snmp troubleshooting. 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.
Router R6 is configured to send SNMP inform requests to the NMS at 192.168.1.1. Configuration: snmp-server host 192.168.1.1 informs version 2c public, snmp-server enable traps. The NMS receives no informs. R6's show snmp statistics shows InformRequestsSent: 0, and show snmp pending shows no pending. The NMS can poll R6 successfully. The network has a firewall between R6 and the NMS that allows UDP 162. What is the root cause?
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 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3.
SNMP informs require a response from the NMS. The NMS must be configured to send an SNMP response to the inform. If the NMS does not support informs or is not configured to respond, the router will not send informs. However, the show statistics shows 0 sends, meaning the router is not even attempting. The issue is that the router's SNMP agent is not generating the inform because the trap source is not reachable or the inform timeout is too low. But the NMS can poll, so reachability is fine. The correct answer is: 'The 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3.'
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 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3.
Why this is correct
SNMPv2c does not support informs; it only supports traps. Informs require SNMPv3. The configuration uses v2c, so no informs are sent.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The NMS is not configured to send SNMP responses to informs.
Why it's wrong here
This would cause the router to send informs but not receive responses, but the statistics show 0 sends, so the router is not even trying.
- ✗
The firewall is blocking UDP 162 from the NMS to the router.
- ✗
The router's SNMP agent is not enabled due to a missing 'snmp-server' command.
Why it's wrong here
The router has 'snmp-server enable traps' and the host command, so the agent is enabled.
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
This would cause the router to send informs but not receive responses, but the statistics show 0 sends, so the router is not even trying.
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.
What to study next
Got this wrong? Here's your next step.
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.
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FAQ
Questions learners often ask
What does this 300-410 question test?
SNMP Troubleshooting — This question tests SNMP Troubleshooting — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3. — SNMP informs require a response from the NMS. The NMS must be configured to send an SNMP response to the inform. If the NMS does not support informs or is not configured to respond, the router will not send informs. However, the show statistics shows 0 sends, meaning the router is not even attempting. The issue is that the router's SNMP agent is not generating the inform because the trap source is not reachable or the inform timeout is too low. But the NMS can poll, so reachability is fine. The correct answer is: 'The 'snmp-server host' command for informs requires the 'informs' keyword to be placed correctly, but the router may not support informs with v2c; informs are only supported with SNMPv3.'
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.
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Last reviewed: Jun 18, 2026
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.
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