Basic explanation of the way a group of rules would be applied to a firewall. This is an abstract explanation, based on a network map, where the information is simply inserted into a table. [iframe width=”640″ height=”360″ src=”http://www.youtube.com/embed/JSNn4w1aBho?vq=hd720″ frameborder=”3″ allowfullscreen]   The Security+ SY0-401 Authorized Cert Guide is available at Amazon.