Network - TCP (Transmission Control Protocol)


The Transmission Control Protocol (TCP) is a protocol of the Internet protocol suite (TCP/IP).

It originated in the initial network implementation in which it complemented the Internet Protocol (IP). Therefore, the entire suite is commonly referred to as TCP/IP.

It is a network layer protocol for one-to-one connections.

TCP ensures that messages between computers are transmitted:

  • reliably
  • in order
  • without error (delivery check)

A Message is a stream of octets (bytes) between applications running on hosts communicating via an IP network.

Socket communications are nowadays bidirectional.

HTTP runs over TCP.



Major internet applications rely on TCP:



See connection process

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