NSE7 Enterprise Firewall and VDOMs Practice Question
An administrator is troubleshooting a VPN tunnel that fails to establish. The administrator has verified that pre-shared keys match and phase 1 parameters are correct. Which TWO additional items should be checked?
⚠ Common exam trap
Many candidates assume phase 2 parameters must be checked first, but the question specifies the tunnel fails to establish, meaning phase 1 has not completed, so phase 2 is irrelevant at this stage.
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
✓
NAT traversal configuration
NAT traversal (NAT-T) is required when a VPN tunnel passes through a device performing Network Address Translation (NAT). NAT-T encapsulates ESP packets inside UDP 4500 to avoid issues with NAT modifying IP headers. Even if phase 1 parameters match, without NAT-T enabled on both peers, the tunnel may fail to establish if a NAT device is detected between them.
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 phase 2 proposal
Why it's wrong here
Phase 1 failure would be the issue; phase 2 comes after phase 1 establishes.
- ✗
The NTP server configuration
Why it's wrong here
Time may affect certificate validation but not pre-shared key VPNs typically.
- ✗
The FortiGate's hostname
Why it's wrong here
Hostname does not affect VPN 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.