Network Security Principles and Practices

An Introduction to Security Zones

Although the security features available in the various networking devices play an important part in thwarting network attacks, in reality one of the best defenses against network attacks is the network's secure topological design. A network topology designed with security in mind goes a long way in forestalling network attacks and allowing the security features of the various devices to be most effective in their use.

One of the most critical ideas used in modern secure network design is using zones to segregate various areas of the network from each other. Devices placed in the various zones have varying security needs, and the zones provide protection based on these needs. Also, the roles that some devices ...