The Internet Protocol Suite (commonly known as TCP/IP) is the set of communications protocols used for the Internet and other similar networks. It is named from two of the most important protocols in it: the Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first two networking protocols defined in this standard.
The TCP/IP model consists of four layers From lowest to highest, these are the
Link Layer, the Internet Layer, the Transport Layer, and the Application Layer.