What is a layer in the OSI model?

OSI (Open System Interconnection) Model

The OSI model, or Open System Interconnection Model, is a framework used for communication between software applications on different computers via a physical medium with different abstraction layers.

Layers in The OSI Model

In the OSI Model, there are seven layers and every layer has different functions this model, it's named:

1. Physical Layer
2. Data-Link Layer
3. Network Layer
4. Transport Layer
5. Session Layer
6. Presentation Layer
7. Application Layer