FORTINET-NSE56 Nse6 Security Fabric Specialist Topics Practice Question
You are debugging a SAML authentication issue where FortiAuthenticator is the IDP. The logs show 'Assertion expired'. What is the most likely cause?
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
✓
Time skew between IDP and SP
Time skew between the IDP and SP (Service Provider) is the most common cause of expired assertion errors.
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 browser is blocked
Why it's wrong here
Browser issues would typically prevent the user from reaching the login page.
- ✗
The SAML certificate is self-signed
Why it's wrong here
Self-signed certificates are allowed, they just trigger warnings.
- ✗
The user password is too old
Why it's wrong here
Password age causes authentication failure, not assertion expiration.
- ✓
Time skew between IDP and SP
Why this is correct
SAML assertions have a strict validity window; if clocks are out of sync, the assertion is rejected.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Fortinet exam blueprint
This FORTINET-NSE56 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 FORTINET-NSE56 exam.