Firewall

Intro
A firewall is a network system that provide a service that monitors the outgoing and most importantly the incoming network signals based on a set of rules provided by the user. It is an essential part of network security and without it could provide the network with some serious threats.

Usages:
Network firewalls are typically a piece of software or sometimes can be hardware based.

Advantages:
·     Increases security of the network

·     Cost effective

·     Fast and reliable updates for the users

Disadvantages:
·     Reduced performance

·     Doesn't stop internal attacks