Chapter 12. Layer 2 Protocol Essentials

This chapter covers the following topics:

• The fundamentals of the Ethernet technology in switched environments: the frame format (Ethernet v2 and 802.3), the address format, and the frame size

• Characteristics and differences of Fast Ethernet, Gigabit Ethernet, and 10-Gigabit Ethernet

• Ethernet switching: the fundamentals of transparent bridges and the forwarding table

• How to virtualize LAN Ethernet segments with VLANs

• The most commonly used Layer 2 protocols, with special focus on spanning tree (port roles and states, bridge priority, logical ports)

• The most recent spanning-tree improvements—specifically, 802.1w and 802.1s

• How to choose the most appropriate spanning-tree algorithm

The design ...

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