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- Robert Metcalfe invented, standardized, and commercialized Ethernet. Developed as a way to link the computers at Xerox's Palo Alto Research Center (PARC) to one another, Ethernet uses digital packets and distributed controls to transmit data over what would become the most widely used local area network, or LAN.
www.invent.org/inductees/robert-m-metcalfe
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While pursuing his doctorate in computer science, Metcalfe took a job with MIT's Project MAC after Harvard refused permission for him to connect the university to the then-new ARPAnet. At MAC, Metcalfe was responsible for building some of the hardware that would link MIT's minicomputers with ARPAnet.
Feb 14, 2019 · The Ethernet patent is U.S. patent #4,063,220, awarded in 1975. Metcalfe completed creation of an open Ethernet standard in 1980, which became an IEEE industry standard by 1985. Today, Ethernet is considered the genius invention that means we no longer have to dial up to access the Internet.
- Mary Bellis
- Robert Metcalfe – Early Years
- At Xerox Parc and Alohanet
- The Invention of Ethernet
- The Ethernet Patent
- Honors
- Metcalfe’s Law
- Ethern et and Beyond
Metcalfe was born in 1946, in Brooklyn, NY. In 1964, Metcalfe graduated from Bay Shore High School. He graduated from MIT in 1969 with two B.S. degrees, one in Electrical Engineering and the other in Industrial Management from the MIT Sloan School of Management. He then went to Harvard for graduate school, earning his M.S. in 1970. While pursuing a...
Robert Metcalfe had already accepted a job a Xerox’s Palo Alto Research Center (PARC). He was told to come take his job anyway and finish his doctoral work later. His inspiration for a new dissertation came while working at Xerox PARC when he read a paper about the ALOHA network, or Alohanet at the University of Hawaii. The Alohanet used radio wave...
Metcalfe was working at Xerox PARC in 1973 when he and David Boggs invented Ethernet, initially a standard for connecting computers over short distances. He was given the task of designing a way to connect Xerox’s new personal computers, the Altos, to each other. Metcalfe identifies the day Ethernet was born as May 22, 1973, the day he circulated a...
In 1975, Xerox filed a patent application listing Metcalfe, David Boggs, Chuck Thacker, and Butler Lampson as inventors. In 1976, Metcalfe moved to Xerox’s Systems Development Division to manage microprocessor and communication developments. While at PARC he began eight years of part-time teaching at Stanford University, finishing as a consulting A...
In 1980 he received the Association for Computing Machinery Grace Murray Hopper Award for his contributions to the development of local networks, specifically Ethernet. Metcalfe retired from 3Com in 1990. He was editor of InfoWorld magazine for ten years. In 1995, he was elected to the American Academy of Arts and Sciences. In 2003, he received the...
Metcalfe’s Law is a rule of thumb about the cost-benefit ratio of communication systems. It assumes that the benefits of a communications system grow in proportion to the number of possible connections between subscribers (i.e., roughly the square of the number of subscribers), while the costs grow only in proportion to the number of subscribers th...
Now an international computer industry standard, Ethernet is by far the most widely installed LAN, with connected computers numbering 50 million. Over the course of its history, Ethernet data transfer rates have been increased from the original 3 megabits per second (Mbit/s) to the latest 400 gigabits per second. Computing Conversations: Bob Metcal...
With Boggs, Metcalfe invented what has come to be known as Ethernet, the local area networking (LAN) technology that turns PCs into communication tools by linking them together. Eventually, the technology would be used to link together more than 50 million PCs worldwide.
Ethernet uses some software (borrowed from Internet Protocol), but the connecting hardware was the basis of the patent, involving newly designed chips and wiring. The patent describes ethernet as a "multipoint data communication system with collision detection".
Working with associates at PARC on some of the earliest personal computers, Metcalfe invented one of the first and now most widely deployed networking technologies, Ethernet. Today, over a quarter billion new Ethernet switch ports are shipped annually worldwide.
Feb 14, 2018 · Bob Metcalfe is an MIT-Harvard-trained engineer-entrepreneur who became an Internet pioneer in 1970, invented Ethernet in 1973, and founded 3Com Corporation in 1979. About 1.2B Ethernet ports were shipped last year — 400M wired and 800M wireless (Wi-Fi).
