• One of the main protocols of the Internet protocol suite. TCP originated in the initial network implementation where it complemented the Internet Protocol (IP), which is why the entire suite is commonly referred to as TCP/IP. It provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network. Major Internet applications such as the World Wide Web, email, remote administration, and file transfer rely on TCP. SSL/TLS often runs on top of TCP. TCP is connection-oriented, and a connection between client and server is established (passive open) before data can be sent. Three-way handshake (active open), retransmission, and error detection add to its reliability, though they also increase latency. TCP was conceived in 1974. ← Wikipedia

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