Chapter 6. Building Ethernet LANs with Switches

While Ethernet defines what happens on each Ethernet link, the more interesting and more detailed work happens on the devices connected to those links: the NICs inside devices and the LAN switches. This chapter takes the Ethernet LAN basics introduced in Chapter 2, “Fundamentals of Ethernet LANs,” and dives deeply into many aspects of a modern Ethernet LAN, while focusing on the primary device used to create these LANs: LAN switches.

This chapter breaks down the discussion of Ethernet and LAN switching into two sections. The first major section looks at the logic used by LAN switches when forwarding Ethernet frames, along with the related terminology. The second section considers design and implementation ...

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