FORTINET-NSE123 Practice Question: Nse 2 Technical Introduction TO Fortinet Security
An administrator configures a firewall policy with Antivirus enabled in flow-based inspection mode. When a user attempts to download an infected file, how does the FortiGate handle the transfer?
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
✓
It aborts the connection immediately and displays a replacement message to the user
In flow-based inspection, when malware is detected, the FortiGate interrupts and drops the connection stream immediately, replacing the file with a replacement message.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
It drops the packet silently without notifying the user or generating a log
Why it's wrong here
FortiGate logs security events and can present a replacement message page to the browser.
- ✓
It aborts the connection immediately and displays a replacement message to the user
Why this is correct
Flow-based antivirus drops the malicious stream instantly upon detection.
- ✗
It buffers the entire file to disk, cleans the file, and then emails the cleaned file to the user
Why it's wrong here
FortiGate does not automatically email cleaned files; it blocks or replaces the active stream.
- ✗
It allows the download to complete and then quarantines the file locally on the client endpoint
Why it's wrong here
The firewall intercepts traffic inline; it does not permit infected files to reach the endpoint.
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JA
Written and reviewed by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
Last reviewed August 2026 · checked against the official Fortinet exam blueprint
This FORTINET-NSE123 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 FORTINET-NSE123 exam.