Network Attacks

Intro
Network security consists of the policies adopted to prevent and monitor unauthorized access, misuse, modification, or denial of a computer network and network-accessible resources. Network security involves the authorization of access to data in a network, which is controlled by the network administrator

Issues:
Networks are subject to attacks from malicious sources. Attacks can be from two categories: "Passive" when a network intruder intercepts data traveling through the network, and "Active" in which an intruder initiates commands to disrupt the network's normal operation.

An example of a passive attack would be wiretapping. This is similar to the telephone version where the intruder listens to what both people are saying. In networks this could be a form of looking at someones screen that has confidential information on remotely.