NSE7 Enterprise Firewall and VDOMs Practice Question
This NSE7 practice question tests your understanding of enterprise firewall and vdoms. This is a configuration task: choose the command set that satisfies every stated requirement. Small differences — like 'secret' vs 'password' or 'transport input ssh' vs 'all' — change whether the answer is correct. After answering, compare your reasoning against the explanation and wrong-answer breakdown below. Once you have made your selection, read the full explanation to reinforce the concept and understand why each distractor is designed to mislead on exam day.
A FortiGate administrator configures inter-VDOM routing. Traffic from VDOM-A to VDOM-B is blocked. The administrator checks the policy in VDOM-A allowing traffic to the VDOM link interface. What else must be verified?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
That there is a corresponding policy in VDOM-B allowing traffic from the VDOM link to the destination
In inter-VDOM routing, traffic traverses a VDOM link, which consists of two interfaces—one in each VDOM. A policy in VDOM-A permits traffic to the VDOM link interface, but the packet must also be allowed by a policy in VDOM-B from the VDOM link interface to the destination. Without this second policy, VDOM-B will drop the traffic, even if VDOM-A's policy is correct.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
✓
That there is a corresponding policy in VDOM-B allowing traffic from the VDOM link to the destination
Why this is correct
Traffic must be allowed in both directions.
Related concept
Read the scenario before looking for a memorised answer.
✗
That the VDOM link uses a different interface type
Why it's wrong here
Interface type is not relevant.
✗
That the VDOM link interface is in the same subnet
Why it's wrong here
VDOM links are point-to-point; they don't need to be in same subnet.
✗
That inter-VDOM routing is enabled in system settings
Why it's wrong here
No such global setting exists.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates assume a single policy in the source VDOM is sufficient, overlooking that inter-VDOM routing requires explicit policy approval in both VDOMs due to the independent security domains.
Detailed technical explanation
How to think about this question
VDOM links are implemented as a pair of virtual interfaces (e.g., vdom-link-1 in VDOM-A and vdom-link-1 in VDOM-B) that act as a direct Layer 3 connection. Traffic must be permitted by firewall policies in both VDOMs because each VDOM enforces its own security policy independently, similar to how traffic between two physical firewalls requires rules on both devices. In a real-world scenario, forgetting the policy in the destination VDOM is a common misconfiguration that leads to asymmetric routing or silent drops, often diagnosed by checking the traffic log in VDOM-B.
KKey Concepts to Remember
Read the scenario before looking for a memorised answer.
Find the constraint that changes the correct option.
Eliminate answers that are true in general but not in this case.
TExam Day Tips
→Watch for words such as best, first, most likely and least administrative effort.
→Review why wrong options are wrong, not only why the correct option is correct.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
How this comes up in practice
A small business has 20 workstations on the 192.168.1.0/24 network and one public IP from its ISP. The router uses PAT (NAT overload) so all 20 devices share one public address using different source ports. NAT questions test whether you understand the four address terms and which direction each translation applies.
What to study next
Got this wrong? Here's your next step.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Enterprise Firewall and VDOMs — This question tests Enterprise Firewall and VDOMs — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: That there is a corresponding policy in VDOM-B allowing traffic from the VDOM link to the destination — In inter-VDOM routing, traffic traverses a VDOM link, which consists of two interfaces—one in each VDOM. A policy in VDOM-A permits traffic to the VDOM link interface, but the packet must also be allowed by a policy in VDOM-B from the VDOM link interface to the destination. Without this second policy, VDOM-B will drop the traffic, even if VDOM-A's policy is correct.
What should I do if I get this NSE7 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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Question Discussion
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