What is ARPANET?
ARPANET was the network that became the basis for the Internet. Based on a concept first published in 1967, ARPANET was developed under the direction of the U.S. Advanced Research Projects Agency (ARPA). In 1969, the idea became a modest reality with the interconnection of four university computers.
Why ARPANET is Created ?
The initial purpose was to communicate with and share computer resources among mainly scientific users at the connected institutions. ARPANET took advantage of the new idea of sending information in small units called packets that could be routed on different paths and reconstructed at their destination. The development of the TCP/IP protocols in the 1970s made it possible to expand the size of the network, which now had become a network of networks, in an orderly way.
When ARPANET is Created ?
In October 1969, the first ARPANET communications were sent between Kleinrock's lab at UCLA and the Stanford Research Institute (SRI) under the direction of Elizabeth Feinler. (Feinler later led the development of the domain names .gov, .com, .edu, .mil and others.) By the end of 1969, ARPANET had two more nodes at the University of California, Santa Barbara, and the University of Utah.
Many of the researchers who worked on ARPANET made significant contributions to the evolution of the Internet, including Leonard Kleinrock, inventor of packet switching (a basic Internet technology). Vinton Cerf and Robert Kahn invented TCP/IP protocol in the 1970s, and in 1972, Ray Tomlinson introduced network email.
