SATNET

SATNET, also known as the Atlantic Satellite Network, was an early satellite link that formed an initial segment of the Internet. It was implemented by BBN Technologies under the direction of the Advanced Research Projects Agency.

In 1973, Bob Kahn designed the interconnection of the ARPANET with other networks. He enlisted Vint Cerf, who was teaching at Stanford. The problem is that the ARPANET, radio-based PRnet, and SATNET all had different interfaces, packet sizes, labeling, conventions and transmission rates. Linking them together was very difficult. In response, Kahn and Cerf set about designing a net-to-net connection protocol. Cerf led the newly formed International Network Working Group. In September 1973, the two gave their first paper on the new Transmission Control Protocol (TCP) at an INWG meeting at the University of Sussex in England. In the end, SATNET was assigned a /8 IPv4 address range in the List of assigned /8 IPv4 address blocks.

• Bolt Beranek and Newman Inc., "Combined Quarterly Technical Report No. 29", May 1983, Prepared for the Defense Advanced Research Projects Agency.
• University College London ARPANET Project, Annual Report 1977, by Professor Peter T. Kirstein, April 1978.