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300-410 SNMP Informs Practice Question
Which TWO statements correctly describe the use of SNMP inform requests compared to traps? (Choose TWO.)
⚠ Common exam trap
A common pitfall is assuming that the 'snmp-server enable traps' command also enables informs, but it does not. Informs require an explicit separate configuration.
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
✓
Informs require the NMS to send an acknowledgment back to the router.
SNMP inform requests require the NMS to send an acknowledgment (SNMPv2 InformResponse-PDU), making them reliable at the application layer. Option C is correct because the default retransmission timeout for SNMP informs is 30 seconds on Cisco devices. Option E is incorrect because the 'snmp-server enable traps' command only enables traps, not informs; informs require a separate configuration (e.g., 'snmp-server enable informs').
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Informs require the NMS to send an acknowledgment back to the router.
Why this is correct
Informs require the NMS to send an acknowledgment, making them reliable at the application layer.
- ✗
Traps are more reliable than informs because they use UDP with a higher priority.
Why it's wrong here
Traps are not more reliable; they are unacknowledged. Inform requests are more reliable due to acknowledgment and retransmission.
- ✓
The default retransmission timeout for informs is 30 seconds.
Why this is correct
The default retransmission timeout for SNMP informs is 30 seconds on Cisco devices.
- ✗
Informs and traps are mutually exclusive; a router can only send one type to a given NMS.
Why it's wrong here
Informs and traps are not mutually exclusive; a router can be configured to send both types to different NMS hosts, or even both to the same host.
- ✗
Both informs and traps are enabled using the 'snmp-server enable traps' command.
Why it's wrong here
This statement is incorrect. The 'snmp-server enable traps' command enables only traps. Informs require a separate configuration, such as 'snmp-server enable informs' or 'snmp-server host ... informs'.
Quick reference
OSI Model Reference
| Layer | Name | PDU | Key Protocols / Devices |
|---|---|---|---|
| 7 | Application | Data | HTTP, HTTPS, DNS, SMTP, FTP, SSH |
| 6 | Presentation | Data | TLS / SSL, JPEG, ASCII encoding |
| 5 | Session | Data | NetBIOS, RPC, SIP |
| 4 | Transport | Segment / Datagram | TCP, UDP |
| 3 | Network | Packet | IP, ICMP, OSPF — Routers |
| 2 | Data Link | Frame | Ethernet, Wi-Fi, PPP — Switches, Bridges |
| 1 | Physical | Bits | Cables, NICs, Hubs, Repeaters |
Go deeper
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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.