hardMultiple Choice
300-410 Practice Question: Runs the following command on Router R1: R1# show…
A network engineer runs the following command on Router R1:
R1# show snmp statistics SNMP packets input: 150
Bad SNMP version errors: 0 Unknown community name: 25 Illegal operation for community name: 0 Encoding errors: 0 Number of requested variables: 300 Number of altered variables: 0 Get-request PDUs: 120 Get-next PDUs: 30 Set-request PDUs: 0
SNMP packets output: 200
Too big errors: 0
No such name errors: 10
Bad values errors: 0 General errors: 0 Response PDUs: 200 Trap PDUs: 0
Based on this output, which statement is correct?
⚠ Common exam trap
Cisco often tests the distinction between input and output packet counters, tricking candidates into confusing the total input (150) with the total output (200) or misinterpreting specific error counters like 'Unknown community name' as a different type of failure.
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
✓
There are 25 SNMP requests with invalid community strings.
The 'Unknown community name: 25' counter indicates that 25 incoming SNMP packets contained a community string that did not match any configured community on Router R1. This means those requests were rejected due to invalid community strings, making option A correct.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
There are 25 SNMP requests with invalid community strings.
Why this is correct
The counter "Unknown community name: 25" increments when an inbound SNMP packet carries a community string the router does not recognise. That directly evidences 25 requests rejected for invalid community strings, distinct from the ten "no such name" errors returned for missing OIDs.
- ✗
The router has sent 150 trap PDUs.
Why it's wrong here
Trap PDUs output is 0, so no traps were sent; the 150 figure is total SNMP packets input. Traps are unsolicited notifications, and this counter would be non-zero only if the router were configured with snmp-server host and an event triggered a notification.
- ✗
There were 10 set requests that failed due to bad values.
Why it's wrong here
The 10 no-such-name errors are output errors returned to the manager, and set-request PDUs input is 0, so no set requests arrived. Bad values errors is 0. Set requests would be relevant only when the manager writes configuration via SNMP.
- ✗
The router received 200 SNMP packets.
Why it's wrong here
The 200 figure is SNMP packets output, not input; input is 150. Packet direction matters here, and output counts responses and traps the router emits. Input would be the correct counter only when measuring inbound polling from the management station.
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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.