NSE7 Enterprise Firewall and VDOMs Practice Question
A FortiGate admin configures inter-VDOM routing between VDOM-A and VDOM-B using a VDOM link. The admin wants traffic from VDOM-A to reach a server in VDOM-B. Which three configuration steps are required? (Choose three.)
⚠ Common exam trap
Candidates often assume VDOM links automatically route traffic between VDOMs, but they forget that each VDOM maintains its own independent routing table, so explicit static routes are mandatory for inter-VDOM communication.
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 static routes pointing to the VDOM link interface on both VDOMs
Inter-VDOM routing via a VDOM link requires each VDOM to have a static route pointing to the VDOM link interface as the next hop. Without these routes, traffic from VDOM-A destined for a server in VDOM-B would have no path to the VDOM link, and the FortiGate would drop the packets. The static route ensures the firewall can forward traffic between the two VDOMs across the VDOM link.
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 NAT on the VDOM link interface
Why it's wrong here
NAT is not required for inter-VDOM routing unless destination networks overlap.
- ✓
Configure static routes pointing to the VDOM link interface on both VDOMs
Why this is correct
Routes are needed to direct traffic towards the other VDOM via the link.
- ✓
Configure a firewall policy on VDOM-A allowing traffic to the VDOM link interface
Why this is correct
Traffic must be permitted by a firewall policy on the source VDOM.
- ✗
Disable ARP on the VDOM link interfaces
Why it's wrong here
ARP should be enabled for proper layer 2 communication on the link.
- ✓
Create a VDOM link and assign an interface to each VDOM
Why this is correct
The VDOM link provides the logical connection; each VDOM gets one interface of the link.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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