NSE7 Enterprise Firewall and VDOMs Practice Question
A FortiGate running FortiOS 7.4.1 has two VDOMs: CustomerA and CustomerB. The administrator wants CustomerA to access an HTTP server in CustomerB. Both VDOMs have appropriate policies. What additional configuration is required?
⚠ Common exam trap
A common mix-up: candidates assume inter-VDOM policies alone suffice, forgetting that VDOMs are fully isolated routing domains requiring a dedicated link (VDOM link) to exchange traffic.
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
✓
Configure a VDOM link between CustomerA and CustomerB
A VDOM link is required to enable Layer-2 or Layer-3 connectivity between two VDOMs on the same FortiGate. Without a VDOM link, the VDOMs are isolated from each other, even if policies exist. The VDOM link acts as a virtual interface pair that forwards traffic between CustomerA and CustomerB, allowing the HTTP server access.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✓
Configure a VDOM link between CustomerA and CustomerB
Why this is correct
A VDOM link is a virtual interface pair that connects VDOMs.
- ✗
Create a policy allowing traffic from CustomerA to CustomerB
Why it's wrong here
Policies are needed, but without a link, traffic cannot cross VDOMs.
- ✗
Enable inter-VDOM routing under system settings
Why it's wrong here
Inter-VDOM routing is enabled by default, but a link must exist.
- ✗
Assign both VDOMs to the same administrative domain in FortiManager
Why it's wrong here
This does not enable inter-VDOM routing on the FortiGate.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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