what layer is tcp

TCP (Transmission Control Protocol) is a transport-layer protocol in the OSI model. The OSI model describes an idealized network communications protocol family, and TCP corresponds to the transport layer in this model. The TCP/IP model, which is a concise version of the OSI model, contains four layers: the physical layer, data link layer, internet layer, and transport layer. In terms of the TCP/IP model, TCP is part of the transport layer. Additionally, the internet layer in the TCP/IP model is also known as the network layer, and it includes the powerful Internet Protocol (IP) . Therefore, TCP is situated at the transport layer in the TCP/IP model.