This NSE4 practice question tests your understanding of firewall policies and nat. 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.
Which TWO statements about firewall policy order are true?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Policies are evaluated in the order they appear (top-down)
FortiGate firewalls evaluate policies sequentially from top to bottom. The first policy that matches the packet's source, destination, service, and other attributes is applied, and no further policies are checked. This top-down evaluation is fundamental to policy design and troubleshooting.
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.
✗
If a packet does not match any policy, it is allowed by default
Why it's wrong here
Implicit deny blocks unmatched traffic.
✓
Policies are evaluated in the order they appear (top-down)
Why this is correct
This is the default behavior.
Related concept
Read the scenario before looking for a memorised answer.
✗
A more specific policy should be placed below a less specific one to avoid shadowing
Why it's wrong here
More specific should be above to match first.
✗
Once a policy is matched, subsequent policies are still evaluated for logging purposes
Why it's wrong here
Only the matched policy applies; no further evaluation.
✓
Policy order can be changed by dragging policies in the GUI or using CLI commands
Why this is correct
Administrators can reorder policies.
Related concept
Read the scenario before looking for a memorised answer.
Common exam traps
Common exam trap: answer the scenario, not the keyword
The trap here is that candidates often confuse the default action (implicit deny) with an allow-all, or they mistakenly think that logging can be performed by multiple policies after a match, when in reality only the matched policy's logging settings apply.
Detailed technical explanation
How to think about this question
The policy evaluation order is strictly sequential; FortiGate uses a 'first match' model. When a packet arrives, it is checked against each policy in order until a match is found. If no match occurs, the implicit deny rule drops the packet. This behavior is consistent across all FortiGate models and firmware versions, and it is critical for designing effective security policies, especially when using policy-based NAT or VIPs.
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: Policies are evaluated in the order they appear (top-down) — FortiGate firewalls evaluate policies sequentially from top to bottom. The first policy that matches the packet's source, destination, service, and other attributes is applied, and no further policies are checked. This top-down evaluation is fundamental to policy design and troubleshooting.
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.
What is the key concept behind this question?
Read the scenario before looking for a memorised answer.
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This NSE4 practice question is part of Courseiva's free Fortinet certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the NSE4 exam.
Question Discussion
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