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The History of the Internet
Internet Timeline 1973

International ARPANET Connections/ Ethernet Is Created

Backbone:50Kbps ARPANET, Hosts:35

By 1973, an ARPA study showed that email accounted for 75% of all the traffic generated by the estimated 2,000 users. 1973 also saw the first international connections to ARPANET, when the University College of London and Norway's Royal Radar Establishment signed on. The File Transfer specification was defined for transporting files.

Bob Metcalfe's Harvard Ph.D. Thesis outlined the idea for Ethernet. The concept was tested on Xerox PARC's Alto computers on the first Ethernet network called the Alto Aloha System. Below is a diagram of the original Ethernet design.

Metcalfe later went on to form one of the largest networking companies in the world, 3COM. The name was derived from the prefixes of three terms: computer, communication, and compatibility.

Bob Metcalfe
Bob Metcalfe
Ethernet Creator