Quick Answer
The answer is the `diagnose sys session stat` command. This is the correct choice because it directly displays session table utilization statistics, including the number of current sessions and the maximum allowed, allowing an administrator to determine if the table is near capacity and causing new sessions to be dropped. On the Fortinet NSE 4 Network Security Professional exam, this command tests your ability to diagnose performance issues tied to session table limits, a common scenario in troubleshooting slow applications. A frequent trap is confusing this with `diagnose sys session list`, which shows individual session details rather than overall utilization, so remember that "stat" stands for statistics, not a list. For a quick memory tip, think "stat for stats" — the `stat` subcommand gives you the big-picture numbers on session table usage.
This NSE4 practice question tests your understanding of high availability and diagnostics. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is troubleshooting a slow web application. The admin suspects that the FortiGate's session table might be full, causing new sessions to be dropped. Which command should the admin use to check the current session table utilization?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "which command"
Why it matters: Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
get system performance status
Why wrong: Shows CPU/memory but not session table utilization.
diagnose sys session list
Why wrong: This lists details of sessions, not utilization statistics.
diagnose sys session stat
This shows session statistics including count, max, and utilization percentage.
diagnose sys session filter
Why wrong: This sets filters for session listing, not for viewing utilization.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
diagnose sys session stat
The 'diagnose sys session stat' command displays statistics about the session table, including the number of current sessions and the maximum allowed. This helps determine if the session table is near capacity.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
get system performance status
Why it's wrong here
Shows CPU/memory but not session table utilization.
diagnose sys session list
Why it's wrong here
This lists details of sessions, not utilization statistics.
diagnose sys session stat
Why this is correct
This shows session statistics including count, max, and utilization percentage.
Clue confirmation
The clue word "which command" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
diagnose sys session filter
Why it's wrong here
This sets filters for session listing, not for viewing utilization.
Common exam traps
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.
Trap categories for this question
Command / output trap
Shows CPU/memory but not session table utilization.
Detailed technical explanation
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.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
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
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 — study guide chapter
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FAQ
High Availability and Diagnostics — This question tests High Availability and Diagnostics — Read the scenario before looking for a memorised answer..
The correct answer is: diagnose sys session stat — The 'diagnose sys session stat' command displays statistics about the session table, including the number of current sessions and the maximum allowed. This helps determine if the session table is near capacity.
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.
Yes — watch for: "which command". Tests specific CLI syntax. Recall the exact command and its required context — near-synonyms and partial matches are common distractors.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 21, 2026
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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