Chapter 20. System-Level Networking

The system-level network case study models the behavior of changing network infrastructure with respect to a constant set of access control requirements. The example is motivated by the problem of moving a portable computer from one network to another, seamlessly maintaining functionality without violating security constraints. Figure 20.1 illustrates the problem where in a portable computer is carried between an office environment that is closed and secure, a home environment that is somewhat controlled, and a completely open environment such as a coffee shop, where the environment is not known or controllable. The user of the portable computer would like to work on the same task while satisfying security requirements. ...

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