This NSE4 practice question tests your understanding of firewall policies and nat. Match the stated requirement to the specific cloud service, access model, or configuration option — many options are valid in isolation but not for this scenario. 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.
An admin notices that a firewall policy allowing inbound HTTPS to a server is not matching traffic. The policy has source set to 'all', destination to the server's IP, and service to HTTPS. The admin checks the policy list and sees that policy ID 1 matches the traffic. What is the MOST likely reason the intended policy (ID 10) is not matching?
Clue words in this question
Noticing these words before you look at the options changes how you read each choice.
Clue: "most likely"
Why it matters: Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Policy ID 1 has a higher priority and matches before policy ID 10
Policy ID 1 has a higher priority because FortiGate evaluates firewall policies in sequential order from top to bottom. When policy ID 1 matches the traffic (e.g., it also allows HTTPS to the same destination), the traffic is processed by policy ID 1 and never reaches policy ID 10. This is the most likely reason the intended policy is not matching.
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.
✓
Policy ID 1 has a higher priority and matches before policy ID 10
Why this is correct
Policies are evaluated in order; the first matching policy is applied. Policy ID 1 is before ID 10 and matches the traffic.
Clue confirmation
The clue word "most likely" in the question point toward this answer.
Related concept
Read the scenario before looking for a memorised answer.
✗
The firewall policy is disabled
Why it's wrong here
If disabled, it would show as disabled; the issue is ordering.
✗
The service object for HTTPS is misconfigured in policy ID 10
Why it's wrong here
Even if misconfigured, policy ID 1 matching first would prevent evaluation of ID 10.
✗
The destination address is incorrect in policy ID 10
Why it's wrong here
If the destination is correct, the policy would match if reached, but it is never reached because policy ID 1 matches first.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates may think policy ID numbers determine priority, but FortiGate uses the sequential order in the policy list, not the ID number, and the default policy ID 1 is often an 'allow all' or 'deny all' rule that matches before any lower-ID policies.
Trap categories for this question
Command / output trap
If disabled, it would show as disabled; the issue is ordering.
Detailed technical explanation
How to think about this question
FortiGate uses a first-match (top-down) policy evaluation model; once a policy matches, no further policies are evaluated for that session. Policy ID 1 is typically the default implicit deny or an explicit allow policy placed at the top of the list. In real-world scenarios, administrators often inadvertently place broad policies (e.g., 'all to all') above more specific policies, causing the specific policies to never be hit.
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.
Firewall Policies and NAT — This question tests Firewall Policies and NAT — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Policy ID 1 has a higher priority and matches before policy ID 10 — Policy ID 1 has a higher priority because FortiGate evaluates firewall policies in sequential order from top to bottom. When policy ID 1 matches the traffic (e.g., it also allows HTTPS to the same destination), the traffic is processed by policy ID 1 and never reaches policy ID 10. This is the most likely reason the intended policy is not matching.
What should I do if I get this NSE4 question wrong?
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Are there clue words in this question I should notice?
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
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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