Policies are rules which users of a computer system agree to follow.
The aim of policies is to eliminate human error by limiting what the users can do and identifying how they should act when using computers.
Policies may include:
Users may have to agree to an Acceptible Use Policy which will outline what they can and cannot do on an organisations computers and network. Some network policies can be enforced by the computers for example a computer can prevent a USB drive being accessed by a user if it is set up correctly.
Network policies can also be enforced at different levels using User Access Control.