How Data Flows through the OSI Layers

Data Flow Osi Model

To get a better understanding of how the OSI layers function, it is important to know how data flows between the layers. In this section, we'll trace the data as it flows through the layers of the OSI model. As you will see in this section, each layer adds (or encapsulates) some form of header or trailer. (Layer 2, the Data Link layer, is responsible for adding a trailer.) Figure 2.2 shows the data flow from Device A to Device B. Note The example in Figure 2.2 demonstrates how end user packets...