Edition5Origins of the Internet
•Early 1960s
–Defense Department nuclear attack concerns
–Used powerful computers (large mainframes)
–Used leased telephone company lines
•Single connection
–Single connection risk solution
•Communicate using multiple channels (packets)
•1969 Advanced Research Projects Agency (ARPA)
–Packet network connected four computers
•ARPANET: earliest network (became the Internet)
•Academic research use (1970s and 1980s)