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300-410 Practice Question: An engineer is troubleshooting why the NMS is not…
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?
⚠ Common exam trap
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.
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.
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.
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.
- ✗
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.
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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.