- A
0 – Emergency
Emergency messages indicate the system is unusable and require immediate attention.
- B
1 – Alert
Why wrong: Alert messages indicate immediate action is needed but are not as critical as Emergency.
- C
4 – Warning
Why wrong: Warning messages indicate potential issues but are not as urgent as Emergency.
- D
7 – Debug
Why wrong: Debug messages are used for detailed troubleshooting and contain low-severity information.
Question 305 of 520
Syslog Severity Levels: Emergency (0) for Network+
This N10-009 practice question tests your understanding of network operations. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. 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 administrator is reviewing syslog messages generated by a switch. The administrator wants to see only the most critical events, such as system failures. Which syslog severity level should be configured as the filter?
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
✓
0 – Emergency
Syslog severity level 0 (Emergency) is the highest severity, indicating system-level failures that render the switch unusable. By filtering for level 0, the administrator ensures only the most critical events, such as kernel panics or hardware failures, are displayed, excluding all less severe messages.
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.
- ✓
0 – Emergency
Why this is correct
Emergency messages indicate the system is unusable and require immediate attention.
Related concept
Read the scenario before looking for a memorised answer.
- ✗
1 – Alert
Why it's wrong here
Alert messages indicate immediate action is needed but are not as critical as Emergency.
When this WOULD be correct
This option would be correct if the question asked for filtering events that require immediate action but are not necessarily system failures, such as 'critical conditions' or 'immediate attention needed'.
- ✗
4 – Warning
Why it's wrong here
Warning messages indicate potential issues but are not as urgent as Emergency.
When this WOULD be correct
A network administrator wants to filter syslog messages to include warnings and more severe events (e.g., for proactive monitoring of potential issues). In that case, setting the filter to severity 4 (Warning) would capture warnings, errors, critical, alerts, and emergencies.
- ✗
7 – Debug
Why it's wrong here
Debug messages are used for detailed troubleshooting and contain low-severity information.
When this WOULD be correct
This option would be correct if the question asked for filtering to see all events including the most detailed troubleshooting information, or if the goal was to capture maximum verbosity for diagnostic purposes.
Option-by-option analysis
Why each answer is right or wrong
Understanding why wrong answers are wrong — and when they would be correct — is what separates a 750 score from a 900. The N10-009 exam frequently reuses these exact scenarios with slightly different constraints.
✓0 – EmergencyCorrect answer▾
Why this is correct
Emergency messages indicate the system is unusable and require immediate attention.
✗1 – AlertWrong answer — click to see why▾
Why this is wrong here
The question asks for the most critical events like system failures. Severity level 1 (Alert) is less critical than level 0 (Emergency), so it would not capture only the most critical events.
★ When this WOULD be the correct answer
This option would be correct if the question asked for filtering events that require immediate action but are not necessarily system failures, such as 'critical conditions' or 'immediate attention needed'.
Why candidates choose this
Candidates may confuse 'Alert' with the highest severity, not realizing that 'Emergency' (level 0) is the most critical, or they may think 'Alert' is the top level due to its name.
✗4 – WarningWrong answer — click to see why▾
Why this is wrong here
Syslog severity 4 (Warning) is not the most critical; it indicates non-urgent warnings. The question asks for the most critical events like system failures, which require severity 0 (Emergency).
★ When this WOULD be the correct answer
A network administrator wants to filter syslog messages to include warnings and more severe events (e.g., for proactive monitoring of potential issues). In that case, setting the filter to severity 4 (Warning) would capture warnings, errors, critical, alerts, and emergencies.
Why candidates choose this
Candidates may confuse 'Warning' with a high-severity level because the term sounds serious, or they may not recall that syslog severity numbers decrease with increasing severity (0 is highest).
✗7 – DebugWrong answer — click to see why▾
Why this is wrong here
Syslog severity level 7 (Debug) is the least critical, used for detailed debugging information. The question asks for the most critical events like system failures, which correspond to level 0 (Emergency), not Debug.
★ When this WOULD be the correct answer
This option would be correct if the question asked for filtering to see all events including the most detailed troubleshooting information, or if the goal was to capture maximum verbosity for diagnostic purposes.
Why candidates choose this
Candidates may confuse severity levels, thinking higher numbers indicate higher severity, or they might mistakenly believe Debug captures all events including critical ones.
Analysis generated from the official N10-009blueprint and verified against question context. The “when correct” sections are what AI assistants cite when candidates ask “what’s the difference between these options?”
Common exam traps
Common exam trap: answer the scenario, not the keyword
CompTIA often tests the misconception that 'Alert' (level 1) is the highest severity because of its name, but Emergency (level 0) is actually the most critical per the syslog standard.
Detailed technical explanation
How to think about this question
Syslog severity levels are defined in RFC 5424, with 0 (Emergency) being the most critical and 7 (Debug) the least. On Cisco switches, the 'logging trap' command filters messages by severity; setting it to 0 captures only Emergency-level messages, while setting it to a higher number (e.g., 4) includes all levels from 0 to that number. In real-world scenarios, filtering to level 0 is rarely used for continuous monitoring because it excludes alerts that require attention, but it is ideal for isolating catastrophic failures during troubleshooting.
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 N10-009 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 N10-009 question test?
Network Operations — This question tests Network Operations — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: 0 – Emergency — Syslog severity level 0 (Emergency) is the highest severity, indicating system-level failures that render the switch unusable. By filtering for level 0, the administrator ensures only the most critical events, such as kernel panics or hardware failures, are displayed, excluding all less severe messages.
What should I do if I get this N10-009 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 30, 2026
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