- A
The agent does not expect any acknowledgment; it is fire-and-forget.
Why wrong: That describes a trap; informs require acknowledgment.
- B
The agent expects a Response PDU from the manager; if not received, it retransmits.
Informs are confirmed notifications; the agent waits for a Response and retransmits if needed.
- C
The manager sends an acknowledgment at the transport layer only.
Why wrong: SNMP informs use application-layer acknowledgment via Response PDU, not just transport.
- D
The agent sends the inform multiple times by default regardless of acknowledgment.
Why wrong: Retransmission only occurs if no Response is received; it is not unconditional.
Question 1,517 of 2,152
300-410 SNMP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of snmp troubleshooting. Read the scenario carefully and evaluate each option against the stated constraints before committing to an answer. 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.
When an SNMP agent sends an InformRequest, what is the default behavior regarding acknowledgment?
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 agent expects a Response PDU from the manager; if not received, it retransmits.
An SNMP InformRequest is a confirmed notification: the agent expects a Response PDU from the manager to acknowledge receipt. If the agent does not receive this response within a timeout period, it will retransmit the InformRequest. This is defined in RFC 3416 and distinguishes InformRequests from Traps, which are unacknowledged.
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 agent does not expect any acknowledgment; it is fire-and-forget.
Why it's wrong here
That describes a trap; informs require acknowledgment.
- ✓
The agent expects a Response PDU from the manager; if not received, it retransmits.
Why this is correct
Informs are confirmed notifications; the agent waits for a Response and retransmits if needed.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
The manager sends an acknowledgment at the transport layer only.
Why it's wrong here
SNMP informs use application-layer acknowledgment via Response PDU, not just transport.
- ✗
The agent sends the inform multiple times by default regardless of acknowledgment.
Why it's wrong here
Retransmission only occurs if no Response is received; it is not unconditional.
Common exam traps
Common exam trap: answer the scenario, not the keyword
Cisco often tests the distinction between Traps (unacknowledged) and Informs (acknowledged), and the trap here is that candidates confuse the transport-layer acknowledgment (TCP ACK) with the SNMP application-layer Response PDU, leading them to pick option C.
Detailed technical explanation
How to think about this question
Under the hood, the SNMP agent sets a retransmission timer (default often 5 seconds) after sending an InformRequest. If no Response PDU is received before the timer expires, the agent increments a retry counter (default often 3 retries) and resends the inform. This behavior is configurable via the 'snmp-server inform' command in Cisco IOS, where you can set timeout and retry values. In real-world scenarios, this ensures critical events (e.g., interface flapping) are reliably delivered to the NMS even over unreliable networks.
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 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.
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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 agent expects a Response PDU from the manager; if not received, it retransmits. — An SNMP InformRequest is a confirmed notification: the agent expects a Response PDU from the manager to acknowledge receipt. If the agent does not receive this response within a timeout period, it will retransmit the InformRequest. This is defined in RFC 3416 and distinguishes InformRequests from Traps, which are unacknowledged.
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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Last reviewed: Jul 4, 2026
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