(ARPANET) A pioneering longhaul
wide area network funded by
DARPA (when it was still called "ARPA"?).
It became operational in 1968 and served as the basis for
early networking research, as well as a central
backbone
during the development of the
Internet. The ARPANET
consisted of individual
packet switching computers
interconnected by leased lines. Protocols used include
FTP and
telnet. It has now been replaced by
NSFnet.