FORTINET-NSE123 Practice Question: Nse 2 Technical Introduction TO Fortinet Security
What is the primary function of a firewall inspection mode that processes packets at Layer 3 and Layer 4 using packet headers without reassembling application streams?
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
✓
Flow-based inspection
Flow-based inspection examines traffic patterns and metadata efficiently, whereas proxy-based inspection buffers and fully reconstructs application sessions.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Proxy-based inspection
Why it's wrong here
Proxy-based inspection intercepts traffic and buffers the payload before forwarding.
- ✓
Flow-based inspection
Why this is correct
Flow-based inspection uses examination engines to inspect traffic efficiently with lower latency.
- ✗
Deep SSL decryption inspection
Why it's wrong here
SSL inspection decrypts encrypted sessions, which can be done in either flow or proxy mode.
- ✗
Sandbox isolation inspection
Why it's wrong here
Sandbox inspection executes suspicious files in an isolated environment.
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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.