From the course: Wireshark Essential Training
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Grasping the OSI model - Wireshark Tutorial
From the course: Wireshark Essential Training
Grasping the OSI model
- [Instructor] In addition to understanding what the protocols do, a solid understanding of the OSI model and the encapsulation process is important to do effective packet analysis. The seven-layer OSI model standardizes the functions of data transformation by breaking it down into layers. And it outlines how that network interface card encapsulates the data as it's prepared for transit on the network. I'll take a look at the OSI model at a high level. I'll review each layer, and I'll describe the main function. We'll talk about some common protocols in that layer and state the protocol data unit, which defines the shape of the data that it's in, in that layer. And we'll talk about any addresses that are needed, such as MAC address or IP address. Let's start with the Application Layer. Application Layer is Layer 7, and this is all about initiating contact with the network. Usually, a user who would initiate, perhaps…
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