A firewall prevents specific types of information from moving between the outside world, known as the untrusted network, and the inside world, known as the trusted network. The firewall may be a...

A firewall prevents specific types of information from moving between the outside world, known as the untrusted network, and the inside world, known as the trusted network. The firewall may be a separate computer system, a software service running on an existing router or server, or a separate network containing a number of supporting devices. List
FOUR (4)
architectural implementation of a Firewall and describe in details the Packet Filtering Routers with the aid of a diagram.