Back in Chapter 3, this book introduced you to the most important Ethernet standards. Those included the IEEE 802.3 standard, including the Media Access Control (MAC) sublayer, which defines the 6-byte Ethernet addresses. Ethernet also uses IEEE 802.2, which defines a sublayer called Logical Link Control (LLC). 802.2 includes the DSAP field, which identifies the type of packet held in an Ethernet frame. Also in that chapter, you learned the main IEEE standards for Fast Ethernet (802.3u) and Gigabit Ethernet (802.3z and 802.3ab).
This short section describes several other Ethernet standards and summarizes all the salient points of the various Ethernet standards.
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