hardMultiple Select
300-410 Practice Question: Which THREE are valid syslog severity levels…
Which THREE are valid syslog severity levels defined in RFC 5424? (Choose THREE.)
⚠ Common exam trap
The trap is confusing syslog severity names with logging levels from other frameworks — candidates pick 'Fatal' or 'Trace' because those names appear in Python, Java, or other logging systems, but RFC 5424 uses Alert and Debug instead.
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
✓
Emergency (0)
RFC 5424 defines eight syslog severity levels numbered 0 through 7, and Emergency (0) is the highest-severity level, indicating the system is unusable, so option A is correct. Warning (4) is also a defined RFC 5424 severity, representing a condition that should be addressed but is not immediately critical, making option C correct. Informational (6) is likewise a valid RFC 5424 severity used for normal operational messages that require no action, so option E is correct. Option B is incorrect because the level numbered 1 is Alert, not Fatal, and Fatal is not an RFC 5424 severity name. Option D is incorrect because the highest defined severity number is 7 (Debug), so Trace (8) does not exist in RFC 5424.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Emergency (0)
Why this is correct
RFC 5424 defines eight severity levels numbered 0 to 7. Emergency, value 0, is the highest severity, indicating the system is unusable. It is a valid level alongside Alert (1), Critical (2), Error (3), Warning (4), Notice (5), Informational (6) and Debug (7).
- ✗
Fatal (1)
Why it's wrong here
RFC 5424 severity 1 is Alert, not Fatal; Fatal is not a defined syslog severity name. It is tempting because Fatal is a common severity in application logging libraries and maps conceptually to the highest urgency, yet the RFC reserves 0 for Emergency and 1 for Alert.
- ✓
Warning (4)
Why this is correct
RFC 5424 assigns Warning the numeric value 4, sitting between Error (3) and Notice (5). It signals a condition that merits attention but does not yet impair function. This is one of the eight defined severity levels, so it is valid.
- ✗
Trace (8)
Why it's wrong here
RFC 5424 defines eight severities numbered 0 to 7, so value 8 does not exist; Trace is not a syslog severity at all. It is tempting because many logging frameworks expose a Trace level below Debug, and Trace would be correct in those application logging taxonomies, not in RFC 5424.
- ✓
Informational (6)
Why this is correct
Informational carries value 6 in RFC 5424, one step above Debug (7) and below Notice (5). It covers normal operational messages requiring no action. It is one of the eight standard severity levels defined by the RFC.
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Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Cisco exam blueprint
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.