The internet started as a small "net" of interconnected computers, but how were those computers connected? Was a chip manufactured to be installed onto the computer? Was it software?
closed as off-topic by Tea Drinker, Mark C. Wallace♦, o0'., Steven Drennon Dec 7 '14 at 23:02
This question appears to be off-topic. The users who voted to close gave this specific reason:
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The wikipedia article on ARPANET explains the earliest architecture. Communication was over leased telephone lines using acoustic modems. Each node was run by a small, specialized computer that did routing. Communication between the routers and the local computers was through a serial port. To read the packets off the serial port, the local machine would have to have some kind of software installed (what we would call today a "tcp/ip stack").