History of the Internet

  • The Semi Automatic Ground Environment (SAGE) program consisted of networked country-wide radar systems together for the first time.

  • beginning of the Advanced Research Projects Agency Network (ARPANET) which was one of the key networks which our Internet today was based off of.

  • Vinton Cerf and Robert Kahn developed the first description of the TCP protocols (covered more deeply in the Introduction to Networking lesson

  • The term “Internet” was first used in 1974 to describe a single global TCP/IP network detailed in the first full specification of TCP written by Cerf and his colleagues.

  • The first TCP/IP-wide area network was created on January 1, 1983 when all hosts on the ARPANET were switched over from the older protocols to TCP/IP.