NSE7 Advanced Threat Protection Practice Question
A FortiGate administrator wants to block a custom protocol anomaly where a client sends an HTTP request with a malformed header containing a null byte. Which advanced IPS feature should be used?
⚠ Common exam trap
It's easy for candidates to confuse custom IPS signatures with protocol anomaly detection, assuming any pattern match requires a signature, when in fact FortiGate's IPS engine includes built-in protocol decoders that automatically detect RFC violations like null bytes.
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
✓
Enable Protocol Anomaly Detection in the IPS sensor
Protocol Anomaly Detection in the IPS sensor is designed to identify deviations from standard protocol behavior, such as malformed headers or null bytes in HTTP requests. This feature inspects traffic for known protocol violations without requiring custom signatures, making it the correct choice for blocking a null byte anomaly in HTTP headers.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Create a custom IPS signature to match the null byte pattern
Why it's wrong here
Custom signatures are specific; protocol anomaly detection is a separate engine.
- ✗
Enable 'Outbreak Prevention' in the IPS sensor
Why it's wrong here
Outbreak Prevention is for fast-spreading threats, not protocol anomalies.
- ✗
Use the 'http-policy' setting in the WAF profile
Why it's wrong here
WAF handles web attacks, not protocol anomalies at the TCP/IP level.
- ✓
Enable Protocol Anomaly Detection in the IPS sensor
Why this is correct
Protocol anomaly detection identifies malformed packets that violate protocol standards.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
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.