The OSI Model and TCP/IP: Explained

The OSI model consists of seven layers. Each layer builds on top of the other to send and transport data across networks. The act of moving data through each layer is called encapsulation. It’s called encapsulation because each layer adds a component of itself to each ‘packet’ sent through the network. And packets don’t even exist until Layer 3.

It’s already complicated, isn’t it? Everything in the OSI model depends on each piece, but you begin by learning what each of the seven layers is called.

CBT Nuggets trainer Knox Hutchinson introduces the OSI model, explains what each of the seven layers are and what they are called, and why you should NEVER throw away sausage pizza again. Are you ready to get started?

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[AmbiguousAnthony]

I've been in IT for years now and I have to watch videos like this to keep my mind fresh. Listen to this guy!!! This was a great presentation! Better than most I've seen before on the topic of OSI.

[touma]

thank you for the best tip to remember all the layer in order.

[jgudgell]

Hate being the person to point out a mistake, especially when the content you put out is so awesome, however when you spoke about ports you indicated SNMP (Simple Network Management Protocol) as using port 25 and being for email, however that should be SMTP (Send Mail To People).