Architecture and Functional Structure of Transmission Control Protocol Over Various Networks Applications

The communication functions and applications divided into layers, and each device or terminal has a assigned 'Stack' in these layers, where that permit each layer to speak and address the corresponding stack in other layers. That is one of the benefits of layering: the ability to change a layer without requiring other layers to change as well, as long as the service and semantics provided by the layer remain intact. The fourth layer in layered model is transport layer where the protocols can provide a tight connection between any two hosts or more than two.