Category: Computer Science | Last updated: 2026-09-18
What is a firewall?
A) A physical wall protecting servers
B) A network security system that monitors and controls incoming/outgoing traffic
C) A type of antivirus software
D) A backup storage system
Explanation
A firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules, acting as a barrier between trusted and untrusted networks.