Major internet applications such as the World Wide Web, email, remote administration, and file transfer rely on TCP, which is part of the Transport Layer of the TCP/IP suite. TCP provides reliable, ordered, and error-checked delivery of a stream of octets (bytes) between applications running on hosts communicating via an IP network. Therefore, the entire suite is commonly referred to as TCP/IP. It originated in the initial network implementation in which it complemented the Internet Protocol (IP). The Transmission Control Protocol ( TCP) is one of the main protocols of the Internet protocol suite.

Principal protocol used to stream data across an IP network