Gigabit Ethernet Technical Overview
GIGABIT ETHERNET STANDARDS
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802.3z includes specifications of Media Access Control, topology rules, the
Gigabit Media Independent Interface and three physical layer interfaces using a common link encoding (1000BASE-SX,1000BASE-LX and 1000BASE-CX). 802.3z was approved as a standard in June 1998.
802.3z is not a stand-alone document, it includes both changes and
additions to the 802.3 standard to add 1000Mb/s operation to the
previously defined 10 and 100 Mb/s speeds of operation. The IEEE 802.3
standards catalog page lists the most current document that includes the specifications for Gigabit Ethernet operation.
802.3ab adds a Gigabit Ethernet physical layer (1000BASE-T) for operation
over Category 5 unshielded twisted pair wiring to the 802.3 standard.
802.3z AND 802.3ab WORKING DOCUMENTS
If you are interested in how the specifications in the standard were determined, or the simulations, tests and alternatives considered, the minutes and presentations of the 802.3z and 802.3ab Task Forces can be accessed on the IEEE 802.3 Working Group home page.