The Internet protocol suite is a set of communication protocols and a computer networking model that's widely used on the Internet and similar networks. It's also known as TCP/IP, owing to its two most crucial protocols: the Transmission Control Protocol (TCP) and the Internet Protocol (IP), which were the first to be defined in this standard. Originally called the DoD model, after the agency that funded its development, it's now often referred to as the Internet model. TCP/IP enables end-to-end connectivity, outlining how data should be addressed, packetized, transmitted, routed, and received at the destination. It consists of four abstraction layers, which organize the functionality for all related protocols based on the networking scope involved. These layers, in order from lowest to highest, are the link layer, internet layer, transport layer, and application layer. Our goal is to describe the operation and models of the TCP/IP suite in data communication networking.