NSE7 Troubleshooting and Diagnostics Practice Question
After upgrading FortiGate firmware, an admin notices that several sessions using SIP are failing. The SIP ALG was enabled before the upgrade. What is the MOST likely cause?
⚠ Common exam trap
It's easy for candidates to assume the SIP ALG is disabled or removed after an upgrade, but the actual issue is that its configuration is reset to default, altering session handling behavior without disabling the feature itself.
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
✓
The SIP ALG configuration was reset to default, affecting session handling
Upgrading FortiGate firmware can reset the SIP ALG configuration to its default settings, which may alter session handling parameters such as timeouts, port ranges, or application-layer gateway (ALG) behavior. This default reset often causes previously working SIP sessions to fail, especially if custom SIP ALG settings were used to accommodate specific VoIP environments. The SIP ALG remains enabled after the upgrade, but its default configuration may not match the pre-upgrade customizations, leading to session failures.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
The SIP session helper is now deprecated
Why it's wrong here
SIP ALG is still supported; not deprecated.
- ✗
The SIP service port changed
Why it's wrong here
The port typically remains the same; the ALG would still work if enabled.
- ✓
The SIP ALG configuration was reset to default, affecting session handling
Why this is correct
Upgrades can reset ALG settings, causing SIP sessions to fail.
- ✗
The FortiGate's SIP inspection profile was removed
Why it's wrong here
SIP ALG is separate from inspection profiles; the ALG handles session establishment.
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JA
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.