Part II. Networking Infrastructure
With the fundamentals of networking under our belt, we can now take a closer look at the infrastructure that makes up the networks we all use. This section focuses on the switches and routers that make up networks, along with the protocols that drive them.
We start this section with a discussion of the Ethernet protocol, which defines the rules and processes by which computers in a local area communicate. Long before the Internet was in use, computers communicated locally using the Ethernet protocol, and it is still widely used.
We then move on to local-area network (LAN) switching, an extension of the Ethernet protocol ...
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