Chapter 1. Networking Security Concepts

Security has been important for a long time, with an increasing focus on it over the years. When LANs connecting personal computers began to emerge back in the early 1980s, security was not goal number one, and maybe not even in the top two or three when implementing a network. It was more of an afterthought. Today, however, security for corporate networks is at or near the top of the list.

One challenge to network security is that the threats to a network constantly change. You can deal with this in a couple ...

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