OSI Layers 5, 6, and 7

The Session, Presentation, and Application layers of the OSI model take care of the last steps before data is transferred over the network (facilitated by layers 1-4) is shown to end users.

From a pure Network Engineering perspective, the difference between Layers 5, 6, and 7 is not that big significant. In fact, there is another popular Internet communication model known as the TCP/IP model, which groups these three layers into a single layer.

The difference will become even more significant if you are into Engineering Software. But since this is not the focus of this series of articles, we will not dive deep into the differences between these layers.

Many network engineers simply refer to this layer as L5-7 or L5+ or L7.
For the rest of this series, we're going to do the same.