As a matter of fact, when I started writing this post I titled it “Layer 4 of the OSI Model – understanding the application layer,” and then I had to go back and correct myself.

The layers, and what they represent, are as follows: Layer 7: Application. The Application Layer in the OSI model is the layer that is the “closest to the end user”.

It’s important to understand that the TCP Reference Model doesn’t really concern itself with the OSI Model. With TCP traffic, the connections are established at the transport layer .

You will learn the fundamental ideas around getting data from host A to host B over a network using the 7 Layers of the OSI model. Part of Paul Zielie's Deep Dive Series. When you purchase through ...