Network Security Principles and Practices

Caveats

This document presumes that you already have a security policy in place. Cisco Systems does not recommend deploying security technologies without an associated policy. This document directly addresses the needs of large enterprise customers. While most of the principles discussed here also apply directly to small and medium businesses, and even home offices, they do so on a different scale. A detailed analysis of these business types is outside the scope of this document. However, in order to address the issue of smaller-scale networks in a limited manner, the “Alternatives” and “Enterprise Options” sections outline devices that you can eliminate if you want to reduce the cost of the architecture.

Following the guidelines in this document ...