NSE7 Advanced VPN and Zero Trust Practice Question
A FortiGate is configured as a SAML identity provider (IdP) for a partner's SaaS application (SP). Users authenticate via FortiGate's local user database. The administrator successfully tests the SAML flow, but after some time, users are prompted to re-authenticate frequently. 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
✓
The SAML assertion lifetime is configured too short
SAML assertions have a validity period. If the IdP (FortiGate) sets a short assertion lifetime or the SP's session timeout is shorter, users will be prompted to re-authenticate. The most common cause is the assertion lifetime being too short.
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 FortiGate's SAML service provider certificate has expired
Why it's wrong here
A certificate expiration would cause errors, not just frequent prompts.
- ✓
The SAML assertion lifetime is configured too short
Why this is correct
The assertion lifetime controls how long the SAML assertion is valid. If set too low, users need to re-authenticate when it expires.
- ✗
The FortiGate's clock is not synchronized with NTP
Why it's wrong here
Clock skew could cause assertion validation failures, but not just frequent re-authentication.
- ✗
The SP is using HTTP-POST binding instead of redirect
Why it's wrong here
Binding type does not affect session duration.
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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.