Is not the layer of TCPIP protocol?

The TCP/IP model consists of four layers: the Application layer, Transport layer, internet layer, and Link layer. Each layer has specific functions, with the Transport layer responsible for end-to-end communication and data integrity, while the Internet layer handles packet routing and addressing. The TCP/IP model is essential for enabling communication over the internet and other networks. It is often compared to the OSI model, which has seven layers but serves a similar purpose in networking.