NSE7 Advanced Threat Protection Practice Question
An administrator wants to block outbound traffic from internal hosts to known malicious domains without relying on full URL inspection or certificate inspection. The requirement is to use a lightweight DNS-based security service on FortiGate that can block botnet C2 and phishing domains. Which FortiGuard feature should the administrator enable and configure in a DNS filter profile?
⚠ Common exam trap
It's easy for candidates to confuse DNS filtering with web filtering, assuming that web filtering can block domains at the DNS layer without SSL inspection.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
FortiGuard DNS Filter
FortiGuard DNS Filter is the correct choice because it provides DNS-layer security by categorizing and blocking malicious domains using FortiGuard's DNS rating service. It is lightweight and does not require full URL inspection or certificate inspection. Enabling it in a DNS filter profile and applying it to a firewall policy allows the FortiGate to block botnet C2 and phishing domains effectively.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
FortiGuard Anti-Spam
Why it's wrong here
FortiGuard Anti-Spam is used for email filtering and reputation checks on SMTP traffic. It does not block DNS queries to malicious domains and is not applied to general outbound traffic. This feature is irrelevant to the requirement of blocking botnet C2 and phishing domains via DNS.
- ✗
FortiGuard IP Reputation
Why it's wrong here
FortiGuard IP Reputation blocks traffic based on the reputation of IP addresses, not domain names. While it can block C2 IPs, it does not operate at the DNS layer and cannot block domain resolution. The scenario explicitly asks for a DNS-based service to block malicious domains, so IP reputation alone is insufficient.
- ✓
FortiGuard DNS Filter
Why this is correct
FortiGuard DNS Filter uses the FortiGuard DNS rating service to categorize and block malicious domains at the DNS resolution stage. It requires a DNS filter profile applied to a policy, with the FortiGuard category set to block botnet C2, phishing, and other malicious categories. This matches the requirement to block outbound traffic to malicious domains without full URL or certificate inspection.
- ✗
FortiGuard Web Filter
Why it's wrong here
FortiGuard Web Filter inspects HTTP/HTTPS requests using URL categories and typically requires SSL inspection to see full URLs. It is not a lightweight DNS-based service and may not block non-web traffic. The scenario specifically requires a DNS-based approach, so web filtering does not meet the requirement.
Visual reference
Go deeper
Related to this question
About these practice questions
Courseiva writes every NSE7 question from scratch — 718 in total, each with an explanation and a wrong-answer breakdown. None are copied from real exams or dumps. Learn why practice questions differ from exam dumps →
JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed September 2026 · checked against the official Fortinet exam blueprint
This NSE7 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 NSE7 exam.