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Robert "Bob" Melancton Metcalfe (born April 7, 1946) [2] [3] is an American engineer and entrepreneur who contributed to the development of the internet in the 1970s. He co-invented Ethernet, co-founded 3Com, and formulated Metcalfe's law, which describes the effect of a telecommunications network.
Power is drawn from a PS/2 port passthrough cable. Ethernet was developed at Xerox PARC between 1973 and 1974 [4] [5] as a means to allow Alto computers to communicate with each other. [6] It was inspired by ALOHAnet, which Robert Metcalfe had studied as part of his PhD dissertation [7] [8] and was originally called the Alto Aloha Network. [6]
David Reeves Boggs (June 17, 1950 – February 19, 2022) was an American electrical and radio engineer who developed early prototypes of Internet protocols, file servers, gateways, network interface cards [1] and, along with Robert Metcalfe and others, co-invented Ethernet, the most popular family of technologies for local area computer networks.
Joseph Carl Robnett Licklider (1915–1990) was a faculty member of Massachusetts Institute of Technology (MIT), and researcher at Bolt, Beranek and Newman.He developed the idea of a universal computer network at the Information Processing Techniques Office (IPTO) of the United States Department of Defense Advanced Research Projects Agency (ARPA).
A number of experimental and early commercial LAN technologies were developed in the 1970s. Ethernet was developed at Xerox PARC between 1973 and 1974. [15] [16] The Cambridge Ring was developed at Cambridge University starting in 1974. [17] ARCNET was developed by Datapoint Corporation in 1976 and announced in 1977. [18]
1000BASE-X is used in industry to refer to Gigabit Ethernet transmission over fiber, where options include 1000BASE-SX, 1000BASE-LX, 1000BASE-LX10, 1000BASE-BX10 or the non-standard -EX and -ZX implementations. Included are copper variants using the same 8b/10b line code. 1000BASE-X is based on the physical-layer standards developed for Fibre ...
Most Ethernet cables are wired straight-through (pin 1 to pin 1, pin 2 to pin 2, and so on). In some instances, the crossover form (receive to transmit and transmit to receive) may still be required. A cable for Ethernet may be wired to either the T568A or T568B termination standard at both ends of the cable. Since these standards differ only ...
IEEE 802.3 is a working group and a collection of standards defining the physical layer and data link layer's media access control (MAC) of wired Ethernet.The standards are produced by the working group of the Institute of Electrical and Electronics Engineers (IEEE).