A: Stanford, California, United States, B: London, England, United Kingdom, C: Skedsmokorset, Viken, Norway
In 1975 the first two-network demonstration of the Internet Protocol Suite, TCP/IP was performed between Stanford and University College London (UCL).
In November 1977, a three-network TCP/IP test was conducted between sites in the US, University College London, and Norsar in Kjeller, Norway.