<Tr> <Th> Commercial? </Th> <Td> No </Td> </Tr> <Tr> <Th> Funding </Th> <Td> Defense Advanced Research Projects Agency (DARPA) </Td> </Tr> <P> The Advanced Research Projects Agency Network (ARPANET) was an early packet switching network and the first network to implement the protocol suite TCP / IP . Both technologies became the technical foundation of the Internet . The ARPANET was initially funded by the Advanced Research Projects Agency (ARPA) of the United States Department of Defense . </P> <P> The packet switching methodology employed in the ARPANET was based on concepts and designs by Americans Leonard Kleinrock and Paul Baran, British scientist Donald Davies, and Lawrence Roberts . The TCP / IP communications protocols were developed for the ARPANET by computer scientists Robert Kahn and Vint Cerf, and incorporated concepts from the French CYCLADES project directed by Louis Pouzin . </P>

The protocol for communicating over the arpanet became known as