Acronym for Transmission Control Protocol/Internet Protocol. A set of computer-to-computer communications protocols first developed for the Defence Advanced Research Projects Agency (DARPA) in the late 1970s. The set of TCP/IP protocols encompass media access, packet transport, session communications, file transfer, e-mail, and terminal emulation. TCP/IP is supported by a very large number of hardware and software vendors, and is available on many different computers from PCs to mainframes. Many corporations, universities, and government agencies use TCP/IP, and it is also the foundation of the Internet.
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