Even though we dont think about it very often,netowk security is extremely important. A firewall is a component that is used to monitor the incoming and outgoing traffic in a network. They are used to enforce protection in networks. A dedicated firewall for both home and business gives a network a much needed added layer of protection. The firewall may come with advanced features such as VPN$,$ Remote Access and Advanced Web filtering. Outline and explain three types of firewalls.