N10-009 Network Operations Practice Question
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?
⚠ Common exam trap
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.
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.
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
Syslog severity level 0, designated as "Emergency" or "panic," signifies that the system is completely unusable, demanding immediate human intervention to restore functionality. This is the highest possible severity, indicating a critical component failure, a total system crash, or an equivalent catastrophic event. Such messages are typically broadcast to all logged-in users and require urgent attention to prevent prolonged service disruption.
- ✗
1 – Alert
Why it's wrong here
Syslog severity level 1, "Alert," indicates that a condition requiring immediate corrective action has occurred, though the system itself is not necessarily entirely unusable. Examples include a critical security breach, a primary link failure, or a severe hardware error where core services might be severely compromised or at high risk. While urgent and demanding prompt attention, it implies the system might still be partially functional, unlike an 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
Syslog severity level 4, "Warning," indicates a potential problem or non-critical error that might lead to a more serious issue if not addressed, but the system is currently operating normally. Examples include disk space nearing capacity, a minor protocol mismatch, or an authentication failure attempt. These messages serve as proactive alerts for administrators to investigate and prevent future failures, rather than signaling an immediate system collapse.
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
Syslog severity level 7, "Debug," represents the lowest level of message priority, providing highly detailed information primarily intended for developers or network engineers during troubleshooting. These messages often include granular process states, variable values, and extensive event logging, which are typically disabled in production environments due to their high volume and potential performance impact. They offer no indication of a critical system failure.
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
Syslog severity level 0, designated as "Emergency" or "panic," signifies that the system is completely unusable, demanding immediate human intervention to restore functionality. This is the highest possible severity, indicating a critical component failure, a total system crash, or an equivalent catastrophic event. Such messages are typically broadcast to all logged-in users and require urgent attention to prevent prolonged service disruption.
✗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?”
Go deeper
Related to this question
Learn chapter
Network Documentation and Diagrams
Key term
Syslog
Syslog is a standard protocol used to send and store log messages from network devices and servers to a central logging server for monitoring and troubleshooting.
Key term
Switch
A switch is a networking device that connects devices on a local area network and uses MAC addresses to forward data only to the intended recipient.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This N10-009 practice question is part of Courseiva's free CompTIA 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 N10-009 exam.