NSE7 Advanced Networking and SD-WAN Practice Question
An administrator connects a FortiExtender to the FortiGate's USB port. The FortiGate detects the FortiExtender and creates a virtual interface 'wwan1'. However, the link status shows 'down'. The SIM card is inserted and the cellular plan is active. What should the administrator check?
⚠ Common exam trap
Watch out — candidates often assume a detected device with an active SIM and power should automatically show a link-up status, overlooking the mandatory APN configuration required for cellular network attachment.
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 APN settings are not configured under the FortiExtender interface
The link status of the wwan1 interface remains 'down' because the FortiExtender requires the Access Point Name (APN) to be configured to establish a cellular data connection. Without the correct APN, the modem cannot attach to the mobile network, even with an active SIM card and power. The APN is configured under the FortiExtender interface settings on the FortiGate, not on the FortiExtender itself.
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 APN settings are not configured under the FortiExtender interface
Why this is correct
APN is required for cellular connectivity; without it, the link stays down.
- ✗
The FortiGate needs a security policy allowing traffic from wwan1
Why it's wrong here
Policy does not affect link status.
- ✗
The FortiExtender firmware is not compatible with the FortiGate
Why it's wrong here
Incompatibility would likely not detect the device.
- ✗
The FortiExtender is not powered on
Why it's wrong here
If detected, it is powered on.
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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.