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Half-duplex gigabit links connected through repeater hubs were part of the IEEE specification, Ethernet was the result of the research done at Xerox PARC in the early 1970s.

802.3z is commonly referred to as 1000BASE-X, where -X refers to either -CX, -SX, -LX, or (non-standard) -ZX. IEEE 802.3ab, ratified in 1999, defines Gigabit Ethernet transmission over unshielded twisted pair (UTP) category 5, 5e or 6 cabling, and became known as 1000BASE-T.This was part of a larger group of protocols known as Ethernet in the First Mile.Initially, Gigabit Ethernet was deployed in high-capacity backbone network links (for instance, on a high-capacity campus network).With the ratification of 802.3ab, Gigabit Ethernet became a desktop technology as organizations could use their existing copper cabling infrastructure.


IEEE 802.3ah, ratified in 2004 added two more gigabit fiber standards, 1000BASE-LX10 (which was already widely implemented as vendor specific extension) and 1000BASE-BX10.In 2000, Apple's Power Mac G4 and Power Book G4 were the first mass-produced personal computers featuring the 1000BASE-T connection.



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