OSI Model and its Layers

Introduction to the OSI Model

The OSI model is a reference model used for communication between two users on a network. Each layer of this model is independent and transmits data from one layer to another.

The 7 Layers of the OSI Model

The OSI model has the following 7 layers:

1. Physical Layer: This layer manages the physical connection of the network, voltage, data rates, etc.
2. Data Link Layer: This layer encodes and decodes data packets into frames and ensures that there are no errors in the data packets.
3. Network Layer: This layer provides I.P. addresses to deliver data packets from one device to another.
4. Transport Layer: This layer is responsible for transferring data from one computer to another and sending it without errors.
5. Session Layer: This layer establishes, maintains, and terminates connections.
6. Presentation Layer: This layer performs data encryption, decryption, and compression and is also called the syntax layer.
7. Application Layer: This layer provides network services to the end user and interfaces between the application and other layers.