ethernet - UPT

C H A P T E R 7. Chapter Goals Understand the required and optional MAC frame formats, their purposes, and their compatibility requirements. List the various ethernet physical layers, signaling procedures, and link media requirements/limitations. Describe the trade-offs associated with implementing or upgrading ethernet LANs choosing data rates, operational modes, and network equipment. ethernet Technologies Background The term ethernet refers to the family of local-area network (LAN) products covered by the IEEE standard that defines what is commonly known as the CSMA/CD protocol. Three data rates are currently defined for operation over optical fiber and twisted-pair cables: 10 Mbps 10 Base-T ethernet 100 Mbps Fast ethernet 1000 Mbps Gigabit ethernet 10-Gigabit ethernet is under development and will likely be published as the IEEE supplement to the IEEE base standard in late 2001 or early 2002.

7-2 Internetworking Technologies Handbook 1-58705-001-3 Chapter 7 Ethernet Technologies Ethernet—A Brief History Ethernet—A Brief History The original Ethernet was developed as an experimental coaxial cable network in the 1970s by Xerox

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