Quick Answer
The answer is that the student policy is placed before the teacher policy in the policy list. FortiGate processes firewall policies sequentially from top to bottom, applying the first match, so if the student policy (source IPs 192.168.1.100-200) sits above the teacher policy (source IPs 192.168.1.10-50), any teacher whose IP falls within the student range—such as 192.168.1.50—will match the student rule first and inherit its web filtering profile that blocks social media. This scenario tests your understanding of policy order and its direct impact on web filtering, a frequent trap on the Fortinet NSE 4 exam where candidates overlook how overlapping source ranges cause unintended blocks. The key is to remember that FortiGate does not evaluate policies based on user role or schedule logic; it strictly follows the list sequence. Memory tip: think of it like a bouncer checking IDs in order—if the first bouncer’s list includes your name, you never reach the second bouncer.
This NSE4 practice question tests your understanding of security profiles. 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.
A school uses FortiGate for web filtering. They want to block social media sites for students during class hours (8 AM to 3 PM) but allow access for teachers at all times. The network has a single internet connection and all users are in the same subnet. The administrator created a firewall policy for students (source IP range 192.168.1.100-200) and another for teachers (source IP range 192.168.1.10-50). The student policy has a web filter profile that blocks social media. However, teachers are also being blocked from social media during class hours. What is the most likely cause?
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.
The web filter profile is applied globally.
Why wrong: Web filter profiles are applied per policy.
The student policy is placed before the teacher policy in the policy list.
Policies are checked in order; first match applies.
The teacher policy has a schedule that restricts access.
Why wrong: No schedule mentioned.
The student policy is placed after the teacher policy.
Why wrong: That would allow teachers first.
Answer choices
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
The student policy is placed before the teacher policy in the policy list.
FortiGate processes firewall policies in sequential order from top to bottom, and the first matching policy is applied. Since the student policy (source IP range 192.168.1.100-200) is placed before the teacher policy (source IP range 192.168.1.10-50), traffic from teachers whose source IP falls within the student range (e.g., 192.168.1.50) will match the student policy first, causing them to be subject to the web filter profile that blocks social media. This is the most likely cause of teachers being blocked during class hours.
Key principle: Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Answer analysis
For each option: why learners choose it and why it is or isn't the right answer here.
The web filter profile is applied globally.
Why it's wrong here
Web filter profiles are applied per policy.
The student policy is placed before the teacher policy in the policy list.
Why this is correct
Policies are checked in order; first match applies.
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 teacher policy has a schedule that restricts access.
Why it's wrong here
No schedule mentioned.
The student policy is placed after the teacher policy.
Why it's wrong here
That would allow teachers first.
Common exam traps
The trap here is that candidates often assume policy order does not matter or that FortiGate evaluates policies based on best match rather than sequential order, leading them to overlook the critical placement of the student policy before the teacher policy.
Detailed technical explanation
FortiGate uses a first-match policy evaluation model where the firewall traverses the policy list from top to bottom and applies the first policy whose source, destination, and other criteria match the traffic. This behavior is similar to access control lists (ACLs) in Cisco IOS, where order is critical. In this scenario, overlapping source IP ranges (192.168.1.10-50 for teachers and 192.168.1.100-200 for students) can cause unintended matches if the student policy is placed higher, as the teacher's IP (e.g., 192.168.1.50) is not within the student range but the teacher's IP could be misconfigured or the ranges overlap if not strictly disjoint. A real-world best practice is to ensure source IP ranges do not overlap or to place more specific policies (e.g., teachers) before broader ones (e.g., students) to avoid such issues.
Key takeaway
Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option.
Real-world example
A network engineer segments a warehouse floor into three subnets: 20 scanners, 5 printers, and 2 management hosts. Picking the wrong mask wastes addresses or leaves too few usable hosts. Exam questions test whether you can apply CIDR notation, calculate block size, and identify the correct usable-host range for a given prefix.
What to study next
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Security Profiles — study guide chapter
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FAQ
Security Profiles — This question tests Security Profiles — Read the scenario before looking for a memorised answer..
The correct answer is: The student policy is placed before the teacher policy in the policy list. — FortiGate processes firewall policies in sequential order from top to bottom, and the first matching policy is applied. Since the student policy (source IP range 192.168.1.100-200) is placed before the teacher policy (source IP range 192.168.1.10-50), traffic from teachers whose source IP falls within the student range (e.g., 192.168.1.50) will match the student policy first, causing them to be subject to the web filter profile that blocks social media. This is the most likely cause of teachers being blocked during class hours.
Identify which exam domain this question belongs to, review the core concept, then practise similar questions from the same domain.
Yes — watch for: "most likely". Probability qualifier — the question wants the most probable cause or outcome, not a guaranteed one. Eliminate low-probability options.
Read the scenario before looking for a memorised answer.
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Last reviewed: Jun 11, 2026
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.
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