Intel, and Xerox to work together to promote Ethernet September 30
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| Intel, and Xerox to work together to promote Ethernet |
Ethernet was developed at Xerox PARC between 1973 and 1974.It was inspired by ALOHAnet, which Robert Metcalfe had studied as part of his PhD dissertation.The idea was first documented in a memo that Metcalfe wrote on May 22, 1973, where he named it after the luminiferous aether once postulated to exist as an "omnipresent, completely-passive medium for the propagation of electromagnetic waves." In 1975, Xerox filed a patent application listing Metcalfe, David Boggs, Chuck Thacker, and Butler Lampson as inventors.In 1976, after the system was deployed at PARC, Metcalfe and Boggs published a seminal paper.That same year, Ron Crane, Bob Garner, and Roy Ogus facilitated the upgrade from the original 2.94 Mbit/s protocol to the 10 Mbit/s protocol which was released to the market in 1980.
Metcalfe left Xerox in June 1979 to form 3Com.He convinced Digital Equipment Corporation (DEC), Intel, and Xerox to work together to promote Ethernet as a standard. The so-called "DIX" standard, for "Digital/Intel/Xerox", specified 10 Mbit/s Ethernet, with 48-bit destination and source addresses and a global 16-bit Ethertype-type field. It was published on September 30, 1980 as "The Ethernet, A Local Area Network. Data Link Layer and Physical Layer Specifications".Version 2 was published in November, 1982 and defines what has become known as Ethernet II. Formal standardization efforts proceeded at the same time and resulted in the publication of IEEE 802.3 on June 23, 1983.
Intel, and Xerox to work together to promote Ethernet September 30
The Ethernet physical layer evolved over a considerable time span and encompasses coaxial, twisted pair and fiber-optic physical media interfaces, with speeds from 10 Mbit/s to 100 Gbit/s, with 400 Gbit/s expected by 2018.The first introduction of twisted-pair CSMA/CD was StarLAN, standardized as 802.3 1BASE5; while 1BASE5 had little market penetration, it defined the physical apparatus (wire, plug/jack, pin-out, and wiring plan) that would be carried over to 10BASE-T.
The most common forms used are 10BASE-T, 100BASE-TX, and 1000BASE-T. All three use twisted pair cables and 8P8C modular connectors. They run at 10 Mbit/s, 100 Mbit/s, and 1 Gbit/s, respectively. Fiber optic variants of Ethernet are also very common in larger networks, offering high performance, better electrical isolation and longer distance (tens of kilometers with some versions). In general, network protocol stack software will work similarly on all varieties.
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
Intel, and Xerox to work together to promote Ethernet September 30
