Developed under U.S. Advanced Research Projects Agency, a Department of Defense agency, ARPANET uses packet-switch technology in order to send and receive data with built-in error correction and package assembly. ARPANET was the first design of what has become known as the Internet today.

How ARPANET is used?

ARPANET also took advantage of a revolutionary new way to send data: packet switching. In packet switching, host computers divide each computer file into smaller segments called packets. Once the packets are transferred, the pieces are reassembled into the original files.

How does ARPANET get internet?

On October 29, 1969, ARPAnet delivered its first message: a “node-to-node” communication from one computer to another. ... ARPANET adopted TCP/IP on January 1, 1983, and from there researchers began to assemble the “network of networks” that became the modern Internet.