Computer Science Medium CSS Uploaded: 13 Aug 2026

What is the primary function of a firewall?

A Compress files
B Speed up internet
C Store data
D Block unauthorized access

Correct Answer: Option D — Block unauthorized access

Explanation:

A firewall monitors and controls incoming and outgoing network traffic based on security rules, primarily to block unauthorized access to or from a private network.

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Subject	Computer Science
Difficulty	Medium
Exam Types	css
Correct	Option D

What is the primary function of a firewall?

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