What is the primary function of a computer firewall?

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Answer 1

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The correct answer is Option 2) To prevent unauthorised access to a private network.

Key Points

A firewall is a network security system that monitors and controls incoming and outgoing traffic based on predetermined security rules.
Its primary purpose is to block unauthorized access to or from a private network.
It acts as a barrier between a trusted internal network and untrusted external networks like the internet.

Additional Information

Option 1 – Speed up internet: Firewalls are not designed for increasing speed.
Option 3 – Detect and remove viruses: This is done by antivirus software, not firewalls.
Option 4 – Store passwords: Passwords are stored using password managers or secure databases.
Firewalls can be hardware, software, or a combination of both, and are crucial in maintaining network security.