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

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My name is Muharrem Aydin. I'm a computer engineer, cyber security expert and I'm going to be your instructor. Let

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me give you a neurally heads up.

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This of course will give you theoretical information about computer networks in general so we won't

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be doing a lot of hands on demo this time.

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But 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 and the most common protocols from the cyber security point

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of view.

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You see a penetration tester needs to know the fundamentals of computer networking. 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, then more talk about the two most well known

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network models. The OSI 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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Datalink layer, network layer, transport layer

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and finally the application layer.