The answer is to check the disk health and available space using the 'diagnose sys disk' commands. This is correct because logging to local disk requires the disk to be operational; if it is full or faulty, the FortiGate cannot write new log entries, even when the firewall policy has logging explicitly enabled. On the Fortinet NSE 4 Network Security Professional NSE4 exam, this scenario tests your understanding of the logging pipeline and the dependency on storage hardware—a common trap is to immediately suspect the policy configuration or log filters when the real issue is a full disk. Remember that disk space is a prerequisite for local logging, not a feature toggle. A useful memory tip: think "Disk First" before diving into policy settings—if the disk is full, no log will be written, regardless of the policy's logging flag.
NSE4 High Availability and Diagnostics Practice Question
This NSE4 practice question tests your understanding of high availability and diagnostics. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An administrator notices that traffic matching a firewall policy is not being logged. The policy has logging enabled. The FortiGate has local disk storage. What should the administrator check first?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "first"
Why it matters: Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
The disk health and available space using 'diagnose sys disk' commands
Logging to disk requires the disk to be operational; if it's full or faulty, logs may not be written.
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.
✗
Whether the FortiGate has a valid FortiAnalyzer subscription
Why it's wrong here
Local disk logging does not require FortiAnalyzer.
✗
Whether FortiCloud logging is enabled
Why it's wrong here
FortiCloud is not needed for local logging.
✓
The disk health and available space using 'diagnose sys disk' commands
Why this is correct
Disk issues can prevent logging; checking disk status is the first step.
Clue confirmation
The clue word "first" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The log severity level on the policy
Why it's wrong here
Severity might filter logs, but if logging is enabled and no logs appear, disk is a likely cause.
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 NSE4 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 NSE4 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.
High Availability and Diagnostics — This question tests High Availability and Diagnostics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: The disk health and available space using 'diagnose sys disk' commands — Logging to disk requires the disk to be operational; if it's full or faulty, logs may not be written.
What should I do if I get this NSE4 question wrong?
Identify which NSE4 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.
Are there clue words in this question I should notice?
Yes — watch for: "first". Order matters here. You are being tested on which action comes before the others — not which action is generally useful.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
These questions test the same concept from different angles. Work through them to make sure you can recognise it however the exam phrases it.
Variation 1. A FortiGate administrator wants to send logs to both a local disk and a remote FortiCloud account. Which two conditions must be met for this to work? (Choose two.)
easy
A.The FortiGate must be configured to log to both destinations simultaneously
✓ B.The FortiGate must have a valid FortiCloud subscription
C.The FortiGate must be in NAT mode
✓ D.The FortiGate must have a hard disk or SSD installed
E.The FortiGate must have a policy to allow outbound traffic to FortiCloud
Why B: The FortiGate must have local storage (disk) to store logs locally. It also must have connectivity to FortiCloud servers, and logging to FortiCloud must be enabled. The local disk logging is a separate configuration.
Variation 2. An administrator wants to ensure that log messages are categorized by severity and that only events with severity 'error' and above are sent to the syslog server. Which configuration should be used?
medium
A.Set 'set severity critical' in syslog config
✓ B.Set 'set severity error' in syslog config
C.Set 'set severity warning' in syslog config
D.Set 'set severity alert' in syslog config
Why B: Option B is correct. In syslog settings, 'set severity' defines the minimum severity level to send. Setting it to 'error' includes error, critical, alert, and emergency messages.
Last reviewed: Jun 21, 2026
Question Discussion
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This NSE4 practice question is part of Courseiva's free Fortinet 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 NSE4 exam.
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