OSI is a reference model that tells how information and data are communicated over a network. It is a conceptual framework that understands the relationships of transmission.
Basically, there are 7 layers of the OSI model. Each layer has its own functionality in the OSI model.
* Layer 1 – Physical
* Layer 2 – Data Link Layer
* Layer 3 – Network
* Layer 4 – Transport
* Layer 5 – Session
* Layer 6 – Presentation
* Layer 7- Application
