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‫Hello, thanks for joining me and welcome to the network fundamentals course.

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‫Let me give you an early heads up this course will give you theoretical information about computer networks

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‫in general, so we won't be doing a lot of hands on demo this time.

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‫Let me point out something else.

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‫I'm not going to claim to teach you everything about networking.

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‫Instead, I'll explain the basics of networking in the most common protocols from the cyber security

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‫point of view.

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‫You see, a penetration tester needs to know the fundamentals of computer networking.

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‫Makes sense, right?

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‫So here's the content of the course.

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‫First, we'll have a brief look at the networking concept that we're talking about the two most well-known

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‫network models, the Osai reference model and the TCP IP reference model.

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‫And then we're going to learn each of the network layers and their most important protocols in detail

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‫data, link layer, network layer, transport layer and finally, the application layer.