Summary This appendix discussed fundamental networking concepts that form a solid foundation for understanding the design and technology sections in the rest of this book. The following topics were explored: An introduction to networks A discussion of networking protocols and the OSI model, a key component of networking and the basis of modern protocol suites LANs and WANs Network devices, including hubs, switches, and routers An introduction to the TCP/IP suite and a discussion of the IP, TCP, and UDP protocols Routing, including an introduction to routing protocols Addressing, including MAC and IP addresses A comprehensive example, illustrating the encapsulation and decapsulation processes
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