The primary function of a firewall is to:

Correct answer: Protect against unauthorized access and threats. A firewall filters network traffic to block unauthorized access and threats.

Background: Firewalls can be hardware, software, or both.

• Increase speed: Firewalls do not increase speed.
• Allow unauthorized access: Firewalls block, not allow, unauthorized access.
• Print: Firewalls do not print.

Did you know? They work like a security guard at a network’s door.

Memory trick: Firewall = protection.