Firewall: Types, Architecture, Working, Advantages and Limitations
A firewall is one of the fundamental security mechanisms used to control
network traffic. It monitors traffic moving between networks or systems
and applies predefined security rules to determine whether traffic should be
allowed, blocked or otherwise handled.
When a computer connects to a network or the Internet, it can communicate with many other systems. Not every communication request should automatically be trusted. A firewall provides a controlled point at which network traffic can be evaluated according to security policies.
Firewalls are important topics in:
