NSE7 Advanced Networking and SD-WAN Practice Question
An administrator wants to integrate a FortiExtender with a FortiGate to provide cellular WAN connectivity. Which configuration step is required on the FortiGate to use the FortiExtender as an SD-WAN member?
⚠ Common exam trap
Many exam-takers confuse the need for a firewall policy or static route with the SD-WAN membership requirement, but the FortiGate treats the FortiExtender interface as a local interface, so only adding it to the SD-WAN zone is necessary for SD-WAN participation.
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
✓
Add the FortiExtender's interface to the SD-WAN zone
To use a FortiExtender as an SD-WAN member, the FortiExtender's physical or logical interface must be added to the SD-WAN zone on the FortiGate. This allows the FortiGate to apply SD-WAN rules, load balancing, and SLA-based path selection to traffic traversing the cellular WAN link. Without this step, the interface remains a standard WAN interface and cannot participate in SD-WAN policies.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Enable BGP on the FortiExtender interface
Why it's wrong here
BGP is optional and not required for basic SD-WAN membership.
- ✗
Create a firewall policy allowing traffic from the FortiExtender
Why it's wrong here
Firewall policies are needed for traffic flow, but the SD-WAN membership is the essential step.
- ✓
Add the FortiExtender's interface to the SD-WAN zone
Why this is correct
The interface representing the FortiExtender must be added as an SD-WAN member.
- ✗
Configure a static route pointing to the FortiExtender
Why it's wrong here
Static routes may be added automatically, but the key step is adding it to SD-WAN.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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