Question 2,042 of 2,152

SNMP Troubleshooting →easyMultiple ChoiceObjective-mapped

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.

An engineer is troubleshooting why the NMS is not receiving SNMP traps from router R8 after a recent configuration change. The engineer added 'snmp-server host 10.1.1.100 version 2c public' and 'snmp-server enable traps' but forgot to remove the old 'snmp-server host 10.1.1.200 version 2c public' command. The NMS at 10.1.1.100 can receive traps from other devices. What is the most likely cause?

Clue words in this question

Noticing these words before you look at the options changes how you read each choice.

Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

A
The engineer did not configure the SNMP community string 'public' on the router.
Correct because the 'snmp-server host' command references a community string that must be defined; without it, traps are not sent.
B
The old 'snmp-server host' command for 10.1.1.200 is causing a conflict, preventing traps to the new host.
Why wrong: Incorrect because multiple host commands are allowed and do not conflict.
C
The engineer needs to remove the old host command before adding the new one.
Why wrong: Incorrect because the new host command works independently; removal is not required.
D
The router requires a reload after adding a new 'snmp-server host' command.
Why wrong: Incorrect because SNMP configuration takes effect immediately.

Full breakdown with real-world context →

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 engineer did not configure the SNMP community string 'public' on the router.

Option A is correct because the router's SNMP agent will not send traps to any host unless the community string referenced in the 'snmp-server host' command is first defined with an 'snmp-server community' command. Without 'snmp-server community public ro' (or rw), the router has no valid community string to include in the trap PDU, so the NMS at 10.1.1.100 will never receive traps from R8, even though the host and enable commands are present.

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 engineer did not configure the SNMP community string 'public' on the router.
Why this is correct
Correct because the 'snmp-server host' command references a community string that must be defined; without it, traps are not sent.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The old 'snmp-server host' command for 10.1.1.200 is causing a conflict, preventing traps to the new host.
Why it's wrong here
Incorrect because multiple host commands are allowed and do not conflict.
✗
The engineer needs to remove the old host command before adding the new one.
Why it's wrong here
Incorrect because the new host command works independently; removal is not required.
✗
The router requires a reload after adding a new 'snmp-server host' command.
Why it's wrong here
Incorrect because SNMP configuration takes effect immediately.

Common exam traps

Common exam trap: answer the scenario, not the keyword

Cisco often tests the misconception that adding 'snmp-server host' alone is sufficient to send traps, when in fact the community string must be explicitly configured with 'snmp-server community' for the trap to be generated and transmitted.

Trap categories for this question

Command / output trap
Incorrect because multiple host commands are allowed and do not conflict.

Detailed technical explanation

How to think about this question

Under the hood, the SNMP agent constructs trap PDUs that include the community string as a plaintext field in the SNMPv2c message. If the community string is not defined via 'snmp-server community', the agent has no valid string to insert, and the trap is silently dropped. In real-world scenarios, engineers often forget that 'snmp-server host' only specifies the destination—it does not implicitly create the community string, which must be defined separately.

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.

Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.

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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 engineer did not configure the SNMP community string 'public' on the router. — Option A is correct because the router's SNMP agent will not send traps to any host unless the community string referenced in the 'snmp-server host' command is first defined with an 'snmp-server community' command. Without 'snmp-server community public ro' (or rw), the router has no valid community string to include in the trap PDU, so the NMS at 10.1.1.100 will never receive traps from R8, even though the host and enable commands are present.

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.

Are there clue words in this question I should notice?

Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.

What is the key concept behind this question?

Read the scenario before looking for a memorised answer.

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