In 1969, the Advanced Research Projects Agency (ARPA), belonging to the United States Department of Defense, funded a project. ARPA established a network of switching packets of computers connected through rented point-to-point lines called the Network of the Agency for Advanced Research Projects (ARPANET), which provided the basis for the first investigations in network interconnection. The conventions developed by ARPA to specify how individual computers could communicate over the network became TCP / IP.
The TCP / IP protocol, acronym for Transmission Control Protocol / Internet Protocol, protocols used to control Internet transmission. It allows different types of computers or computers to communicate through heterogeneous networks.