TCP/IP ベースのインターネット四半世紀

1983 年の今日、国防高等研究計画局 （DARPA=Defense Advanced Research Projects Agency）が TCP/IP に ARPAnet を切り替えた。

On January 1 the ARPAnet -- and every network attached to the ARPAnet -- officially adopts the TCP/IP networking protocol, developed in the 1970s by pioneering network engineers Vinton Cerf and Bob Kahn. From then on, all networks that use TCP/IP are collectively known as the Internet.