Introduction to Information Technology20795 marksSecurity Mechanisms
What is firewall? How firewall is used to secure computer systems?
What is firewall? How firewall is used to secure computer systems? [5]
A firewall is a network security system (either hardware-based, software-based, or both) that monitors and controls incoming and outgoing network traffic based on a set of predefined security rules. It acts as a barrier (or "wall") between a trusted internal network (such as a private LAN) and an...