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
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.