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3
Network Design
In this chapter, you will learn:
•  The purposes of different cable types
•  The differences between networking topologies
•  How switching works
•  Routing basics
•  Multilayer security, including firewalls and intrusion detection systems
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The core protocols of networking provide us with building blocks to do interesting things and allow us ways to communicate with one another better. On top of the protocols, though, there is the hardware that we use to build networks with—and, ultimately, building networks is what we are up to. ...

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