From the course: Exploring Linux Internals: Advanced Insights and Practical Applications

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The OSI model

The OSI model - Linux Tutorial

From the course: Exploring Linux Internals: Advanced Insights and Practical Applications

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The OSI model

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- So, to transform data that is generated by applications into bits that are transmitted over the network, different phases occur, and you should know about these phases, because it helps you in analyzing what is happening at which specific states. The OSI model, which stands for Open Systems Interconnect, was created by ISO to give a theoretic overview of all phases in this transition, and the tools that you are going to use, correspond pretty well to this OSI model. Now, in the working of specific solutions, specific layers in the OSI model may be skipped. For TCP/IP networking, there's another model, and that's the DOD model. The DOD model is something that is really a simplified model of the OSI model. Where OSI has seven layers, DOD has four layers only. In both models, each layer communicates with its peer on the other node, and knowledge of the different layers is very useful if you are analyzing network packet flow. And that's what we are going to do later. So let's have a…

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