The answer is to implement session rate limiting using 'config system session-ttl' and to increase the session time-to-live (TTL) values. These two actions directly mitigate high CPU usage caused by many sessions because they control both the rate at which new sessions are created and the frequency of session expiration events. Rate limiting prevents the CPU from being overwhelmed by a sudden flood of session setup requests, while a longer TTL reduces the overhead of constant session teardown and re-creation, which is a common source of CPU spikes on busy FortiGate units. On the Fortinet NSE 7 Advanced Security NSE7 exam, this scenario tests your understanding of session management under load, often appearing as a trap where candidates mistakenly choose to increase logging or enable deep inspection, which would worsen CPU usage. A reliable memory tip is "Limit the flood, extend the life"—rate limiting controls the flood of new sessions, and extending TTL gives existing sessions a longer life, easing CPU strain.
NSE7 Troubleshooting and Diagnostics Practice Question
This NSE7 practice question tests your understanding of troubleshooting 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.
A FortiGate is experiencing high CPU usage due to a large number of sessions. Which TWO actions can the admin take to mitigate the issue? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Set a shorter session TTL for idle sessions to free up resources
Rate limiting sessions and increasing session TTL can reduce CPU load by controlling session creation and expiration. Option A and D are correct.
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.
✓
Set a shorter session TTL for idle sessions to free up resources
Why this is correct
Shorter TTL removes idle sessions quicker, reducing table size and CPU overhead.
Related concept
Read the scenario before looking for a memorised answer.
✗
Increase the session table size
Why it's wrong here
Increasing table size might reduce session churn but does not directly lower CPU.
✗
Upgrade the firmware to the latest version
Why it's wrong here
Firmware upgrade alone may not resolve high CPU due to session count.
✓
Implement session rate limiting using 'config system session-ttl'
Why this is correct
Limiting session rate reduces the number of new sessions per second, lowering CPU.
Related concept
Read the scenario before looking for a memorised answer.
✗
Disable all security profiles
Why it's wrong here
Disabling profiles may lower CPU but compromises security; not a recommended first step.
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 NSE7 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 NSE7 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.
Troubleshooting and Diagnostics — This question tests Troubleshooting and Diagnostics — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Set a shorter session TTL for idle sessions to free up resources — Rate limiting sessions and increasing session TTL can reduce CPU load by controlling session creation and expiration. Option A and D are correct.
What should I do if I get this NSE7 question wrong?
Identify which NSE7 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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This NSE7 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 NSE7 exam.
Question Discussion
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