The TCP/IP model comprises four layers, as shown in the following diagram. Each layer has a specific purpose to fulfill and utilizes a set of protocols to facilitate communications. Every protocol in every layer has a specific purpose:
The first layer is the Application Layer, which directly interacts with users and subsequent layers and protocols; it is primarily concerned with the representation of the data in a understandable format to the user. The application layer also keeps track of user sessions, monitoring who is connected; it uses a set of protocols that helps to interface with users and other layers ...
