This article is from the AmiTCP/IP FAQ, by Mike Meyer with numerous contributions by others.
TCP/IP stands for Transmission Control Protocol/Internet Protocol. TCP/IP is a protocol that allows any system on a network to talk "directly" to any other system, by passing packets of information back and forth. TCP/IP (and its later relative OSI) is usually used over networks built on top of Ethernet, Token-Ring, Starlan and other LANS. The Internet uses TCP/IP.
 
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