NSE7 Enterprise Firewall and VDOMs Practice Question
This NSE7 practice question tests your understanding of enterprise firewall and vdoms. The scenario asks you to isolate a root cause — eliminate options that address a different problem before choosing. 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 is troubleshooting a scenario where traffic between two VDOMs is not working. The admin has configured inter-VDOM routing. Which TWO steps should the administrator verify? (Choose two.)
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Check that there is a firewall policy in the destination VDOM allowing the return traffic
Option B is correct because inter-VDOM routing requires firewall policies in both the source and destination VDOMs to permit traffic. The destination VDOM must have a policy allowing the return traffic (from the destination to the source) for the session to be established. Without this, the FortiGate will drop the return packets, breaking the bidirectional flow.
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.
✗
Check that NAT is enabled on the policies
Why it's wrong here
NAT is not required for inter-VDOM routing; it can be used but is not necessary.
✓
Check that there is a firewall policy in the destination VDOM allowing the return traffic
Why this is correct
Return traffic must be permitted by a policy in the destination VDOM.
Related concept
Read the scenario before looking for a memorised answer.
✗
Check that the inter-VDOM link is configured as a physical interface
Why it's wrong here
The inter-VDOM link is a logical link, not a physical interface.
✓
Check that there is a firewall policy in the source VDOM allowing traffic to the destination VDOM
Why this is correct
A policy in the source VDOM is required to initiate traffic.
Related concept
Read the scenario before looking for a memorised answer.
✗
Check that both VDOMs are in the same administrative VDOM
Why it's wrong here
Administrative VDOM is separate; traffic VDOMs are different.
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 policies in both VDOMs to allow the forward and return traffic.
Detailed technical explanation
How to think about this question
Inter-VDOM routing on FortiGate uses a special inter-VDOM link, which is a logical interface pair (e.g., 'vdom1->vdom2') that appears as a virtual interface in each VDOM. Traffic traversing this link must be permitted by firewall policies in both VDOMs, and the session table tracks the state across VDOMs. A common real-world scenario is when a FortiGate is used as a multi-tenant firewall, and forgetting the return policy in the destination VDOM causes asymmetric routing failures.
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: Check that there is a firewall policy in the destination VDOM allowing the return traffic — Option B is correct because inter-VDOM routing requires firewall policies in both the source and destination VDOMs to permit traffic. The destination VDOM must have a policy allowing the return traffic (from the destination to the source) for the session to be established. Without this, the FortiGate will drop the return packets, breaking the bidirectional flow.
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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