Summary
In this chapter, we took a closer look at an important concept, the OSI model and the encapsulation process. The OSI model is a framework that serves many purposes. The model provides a common framework for developers and a method to help students understand what process occurs at each layer. In addition to this, understanding each of the layers, the PDU, and the addressing will help you to better comprehend the process in Wireshark and improve your data analysis skills.
By now, you should have a better understanding of the role, purpose, protocols, and PDU of each layer. We explored the encapsulation process and took a look at frame formation as it is seen in Wireshark. To help you understand how your system uses the OSI model, we looked at how the model is represented in the network bindings.
In the next chapter, we'll take a closer look at how to decode the two main Transport layers: TCP and UDP. We'll begin by reviewing the purpose of the Transport layer...
