NSE7 Enterprise Firewall and VDOMs Practice Question
A FortiGate administrator is configuring a multi-VDOM deployment. The administrator wants to use a single physical interface for multiple VDOMs. Which TWO methods allow this?
⚠ Common exam trap
Candidates often assume a physical interface can be directly shared among VDOMs (Option A), not realizing that FortiGate requires either VLAN subinterfaces or NP6 virtual interfaces to achieve this separation.
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
✓
Use NP6 virtual interfaces (e.g., virtual wire) on supported models
On supported FortiGate models with NP6 processors, you can create NP6 virtual interfaces (e.g., virtual wire pairs) that allow a single physical interface to be shared across multiple VDOMs without VLAN tagging. Option C is correct because VLAN subinterfaces can be created on a physical interface and each subinterface assigned to a different VDOM, enabling multi-VDOM use of the same physical port.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Use the same physical interface in multiple VDOMs directly
Why it's wrong here
A physical interface can belong to only one VDOM.
- ✓
Use NP6 virtual interfaces (e.g., virtual wire) on supported models
Why this is correct
Some FortiGate models with NP6 processors support virtual interfaces that can be assigned to different VDOMs.
- ✓
Configure VLAN subinterfaces and assign each to a different VDOM
Why this is correct
VLANs are the standard way to share a physical port among VDOMs.
- ✗
Create a software switch interface and assign it to multiple VDOMs
Why it's wrong here
A software switch interface is a single logical interface; it cannot be split across VDOMs.
- ✗
Configure inter-VDOM routing to share the same IP subnet
Why it's wrong here
Inter-VDOM routing does not solve sharing a physical interface; it allows routing between VDOMs.
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