Transmission Control Protocolconnection-oriented protocol built on top of Internet Protocol (IP) and is nearly always seen in the combination TCP/IP (TCP over IP). It adds reliable communication and flow-control and provides full-duplex, process-to-process connections. TCP is defined in STD 7 and RFC 793. The other protocol that runs on top of IP is User Datagram Protocol (UDP) which, in contrast to TCP, is connectionless.
Last updated: 2001-06-14