1.1 Define the role of a firewall and identify where a firewall should be positioned with relation to protecting a local network. In defining the role of a firewall you should discuss the techniques...

Extracted text: 1.1 Define the role of a firewall and identify where a firewall should be positioned with relation to protecting a local network. In defining the role of a firewall you should discuss the techniques that a firewall uses at different levels to prevent external attacks on the network and control traffic flow through the firewall.