What is a Network Zone in the Department of Computing Science?
A network zone in the Department of Computing Science is some network entity (including a group of machines, network ports and subnets or portions of subnets) which sits behind a firewall. A network zone is defined by the security issues attached to functions, processes and user needs associated with the machines in that zone. The firewall and rules for getting through the firewall then define the access which machines within the zone have to each other and to machines which are outside of that zone and defines the access which machines outside that zone have to machines inside the zone. In addition, machines inside a zone may get addresses that are only valid inside the zone itself and not valid on the rest of the internet.
