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Advanced Research Projects Agency NetworkThe packet-switched internetwork created by the Defense Advanced Research Projects Agency (DARPA) in the early 1970s. ARPANET was the forerunner of the Internet. ARPANET was designed to be a military command and control center that could withstand nuclear attack.ARPANET's founders designed it so that authority was distributed over a large number of geographically dispersed computers. This concept of a computer network with distributed authority is also the basis of the Internet. Theoretically, if 90% of the Internet were destroyed by nuclear attack, the remaining servers would be able to continue on.