NSE7 Troubleshooting and Diagnostics Practice Question
A FortiGate administrator is investigating a slow network performance issue. The administrator suspects that session table limits are being reached. Which TWO metrics should be monitored to confirm this? (Choose two.)
⚠ Common exam trap
The NSE7 exam often tests the misconception that high CPU or memory usage directly indicates session table limits, but the trap here is that session table exhaustion is specifically confirmed by session fail rate and current session count, not by general resource utilization metrics.
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
✓
Session fail rate
The session fail rate (B) directly indicates when the FortiGate is unable to establish new sessions because the session table is full, which is a clear symptom of hitting session table limits. The current session count (C) shows how many sessions are active; when this approaches the maximum session limit (e.g., 2 million on a FortiGate-600E), it confirms the table is near capacity. Monitoring both metrics together provides definitive evidence of session table exhaustion.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Interface bandwidth utilization
Why it's wrong here
Bandwidth utilization indicates traffic load, not session table capacity.
- ✓
Session fail rate
Why this is correct
A high session fail rate may indicate that new session creation is being denied due to table limits.
- ✓
Current session count
Why this is correct
High session count may indicate the session table is near its limit.
- ✗
CPU usage
Why it's wrong here
CPU usage may be high due to many sessions, but it is not a direct indicator of session table limits.
- ✗
Memory usage
Why it's wrong here
Memory usage can be high, but session table limits are separate from general memory.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.