The correct statement is that there are 25 SNMP requests with invalid community strings. This is directly supported by the "Unknown community name: 25" counter in the show snmp statistics output, which increments whenever an SNMP request arrives with a community string that does not match any configured on the router. In the context of the Cisco CCNP ENARSI 300-410 exam, interpreting these error counters tests your ability to diagnose SNMP configuration mismatches and access control issues, a common troubleshooting scenario. A frequent trap is confusing "Unknown community name" with "No such name errors"—the latter indicates the requested MIB object doesn't exist on the device, not an authentication failure. To remember the distinction, think of "community" as the password for access, while "name" refers to the specific data object being queried.
300-410 SNMP Troubleshooting Practice Question
This 300-410 practice question tests your understanding of snmp troubleshooting. Examine the command output carefully: the correct answer depends on what the output actually shows, not on general recall alone. 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.
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
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 output shows SNMP statistics. There are 25 'Unknown community name' errors, indicating that some SNMP requests are using community strings not configured on the router. Additionally, there are 10 'No such name errors' in the output, meaning the requested MIB objects do not exist. No set requests were received.
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.
✓
There are 25 SNMP requests with invalid community strings.
Why this is correct
The 'Unknown community name' counter of 25 indicates that many requests used community strings not recognized by the router.
Related concept
Read the scenario before looking for a memorised answer.
✗
The router has sent 150 trap PDUs.
Why it's wrong here
The 'Trap PDUs' counter is 0, meaning no traps were sent.
✗
There were 10 set requests that failed due to bad values.
Why it's wrong here
Set-request PDUs are 0, so no set requests were received.
✗
The router received 200 SNMP packets.
Why it's wrong here
The router received 150 packets (SNMP packets input: 150).
Common exam traps
Common exam trap: answer the scenario, not the keyword
Many certification questions include familiar terms but test a specific constraint. Read the exact wording before choosing an answer that is generally true but wrong for this case.
Detailed technical explanation
How to think about this question
This question should be treated as a scenario, not a definition check. Identify the problem, the constraint and the best action. Then compare each option against those facts.
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.
Use explanations to understand the rule behind the answer.
TExam Day Tips
→Underline the problem statement mentally.
→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.
Related glossary terms
Concepts from this question explained
These glossary pages explain the core terms tested in this 300-410 question in full detail.
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
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: There are 25 SNMP requests with invalid community strings. — The output shows SNMP statistics. There are 25 'Unknown community name' errors, indicating that some SNMP requests are using community strings not configured on the router. Additionally, there are 10 'No such name errors' in the output, meaning the requested MIB objects do not exist. No set requests were received.
What should I do if I get this 300-410 question wrong?
Identify which 300-410 exam domain this question belongs to, then review the specific concept being tested. Practise related questions in that domain and focus on understanding why each wrong answer is tempting — not just why the correct answer is right.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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