The answer is a Web Filtering profile with FortiGuard categories. This is the correct feature because FortiGuard’s continuously updated database categorizes URLs, including a specific “Malicious Websites” category that blocks access to sites known to host malware, and applying this profile at either proxy-based or flow-based inspection stops users from reaching those threats at the network edge. On the Fortinet NSE 4 Network Security Professional exam, this question tests your understanding of how FortiGate’s web filtering integrates with FortiGuard’s threat intelligence to enforce security policies, and a common trap is confusing it with DNS filtering or antivirus profiles—DNS filtering blocks domain resolution, not HTTP-level access, while antivirus scans files after download rather than preventing the connection. Remember the memory tip: “Web Filter blocks the site before the bite,” meaning you stop the malware at the URL request stage, not after the file arrives.
NSE4 Security Profiles Practice Question
This NSE4 practice question tests your understanding of security profiles. 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.
An administrator wants to block access to websites that host malware. Which FortiGate feature should be configured to achieve this goal?
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Web Filtering profile with FortiGuard categories
FortiGate's Web Filtering profile with FortiGuard categories is the correct feature because it allows administrators to block access to websites based on URL categories, including those known to host malware. FortiGuard maintains a continuously updated database of malicious URLs, and applying a web filtering profile that blocks the 'Malicious Websites' category directly prevents users from accessing such sites. This is the most straightforward and effective method for blocking malware-hosting websites at the proxy or flow-based inspection level.
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.
✗
IPS profile
Why it's wrong here
IPS detects and blocks exploits but does not categorize URLs.
✗
DNS Filter profile
Why it's wrong here
DNS filter blocks based on domain names, not full URLs, and is not category-based for malware.
✗
Application Control profile
Why it's wrong here
Application control manages application usage, not website categories.
✓
Web Filtering profile with FortiGuard categories
Why this is correct
Web filtering allows blocking based on URL categories such as 'Malicious Web Sites'.
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 DNS Filtering (which blocks domains at the DNS level) with Web Filtering (which blocks URLs at the HTTP/HTTPS level), but DNS Filtering cannot block specific URL paths or subdirectories, making it insufficient for blocking malware-hosting websites that may share a domain with legitimate content.
Detailed technical explanation
How to think about this question
FortiGuard Web Filtering uses a cloud-based database of categorized URLs, including 'Malicious Websites' (category 26), which is updated in real-time. When a web filtering profile is applied to a firewall policy, FortiGate inspects HTTP/HTTPS requests and compares the requested URL against the FortiGuard cache or cloud lookup; if the category matches a blocked entry, the request is denied. In flow-based inspection mode, this decision is made inline with minimal latency, while proxy-based mode allows for more granular actions like blocking or warning pages.
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 practitioner preparing for the NSE4 exam encounters this exact type of scenario on the job. The correct answer here is not the most general option — it is the best answer for the specific constraint described. Answer the scenario, not the keyword: identify the specific constraint before choosing the most familiar-sounding option. Real exam questions reward reading the full scenario before eliminating options, because the constraint defines which answer fits.
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.
Security Profiles — This question tests Security Profiles — Read the scenario before looking for a memorised answer..
What is the correct answer to this question?
The correct answer is: Web Filtering profile with FortiGuard categories — FortiGate's Web Filtering profile with FortiGuard categories is the correct feature because it allows administrators to block access to websites based on URL categories, including those known to host malware. FortiGuard maintains a continuously updated database of malicious URLs, and applying a web filtering profile that blocks the 'Malicious Websites' category directly prevents users from accessing such sites. This is the most straightforward and effective method for blocking malware-hosting websites at the proxy or flow-based inspection level.
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.
About these practice questions
Courseiva creates original exam-style practice questions with explanations and wrong-answer analysis. It does not publish real exam questions, exam dumps, or protected exam content. Learn why practice questions differ from exam dumps →
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
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
Share a tip, memory trick, or ask about the reasoning behind this question. Do not post real exam questions, leaked content, braindumps, or copyrighted exam material. Comments are moderated and may be removed without notice.
Sign in to join the discussion.