NSE7 Troubleshooting and Diagnostics Practice Question
A FortiGate is configured with a firewall policy that applies an application control profile blocking social media. Users report that they can still access Facebook. The administrator verifies that the policy is correctly matching the traffic and that the application control profile is applied. Which CLI command should the administrator use to verify whether the application control is correctly identifying the traffic?
⚠ Common exam trap
A common mix-up: candidates confuse application control debugging with IPS debugging, as both are security profiles but handled by different daemons.
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
✓
diagnose debug application appctrl -1
The application control daemon (appctrl) is responsible for identifying applications based on signatures and behavior. Debugging it with 'diagnose debug application appctrl -1' shows real-time detection results for each session, allowing the administrator to confirm if Facebook is being recognized. If it is not, they can then check signature updates or traffic patterns.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
diagnose firewall iprope list
Why it's wrong here
This command displays the IP reputation list and how it is applied, which is used for blocking malicious IPs, not for application identification. It does not provide any information about application control or whether social media traffic is being classified correctly.
- ✓
diagnose debug application appctrl -1
Why this is correct
This command enables debugging for the application control daemon, which performs application identification. It will show logs indicating which application is detected for each session, including whether Facebook is identified as 'Facebook' or a sub-application. This directly verifies if the application control engine is working correctly.
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diagnose debug application ipsmonitor -1
Why it's wrong here
This command enables debug for the IPS monitor daemon, which manages IPS engine processes, not application identification. It would show messages about IPS engine restarts or resource usage, but not whether Facebook traffic is being correctly classified. It is useful for troubleshooting IPS engine crashes, not application control detection.
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diagnose sys session list
Why it's wrong here
This command lists all current sessions with details, but it does not show application identification results. It displays source/destination, policy ID, and bytes, but not the application name or category. While you could see that traffic is allowed, you cannot determine if the application control profile is recognizing Facebook.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Fortinet exam blueprint
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.