OSI MODEL(Open System Interconnection model)

 OSI MODEL:

The full form of  OSI model is Open System Interconnection model it is the basic reference model of the computer networks it plays a key role in communication between devices. The OSI model is having 7 different layers to process the data before transferring the data these 7 different layers are:

1. Application layer
2. Presentation layer
3. session layer 
4. Transport layer
5. Network layer
6. Datalink layer
7. Physical layer

1.APPLICATION LAYER:

In this layer the end user directly interacts with the software such as web-browser, mail application e.t.c in this layer the model recognizes the agent for the communication.

2.PRESENTATION LAYER:

It is also known as the syntax layer because it  transfers the data into the understandable syntax to the application layer or from the application layer and this layer also handles the encryption and decryption required by the application layer

3.SESSION LAYER:

This layer manages the connections between different computers or communication devices 

4.TRANSPORT LAYER:

Transport layer is responsible for transferring the data between the source and destination by changing the size of the data packets

5.NETWORK LAYER:

This layer is responsible to receive data frames from data link layer and transmitting them to the destination to find the destination it uses protocols such as ip protocol.

6.DATALINK LAYER:

Data link layer is responsible for making the data frames and it also corrects the data errors that are acquired from the physical layer it will be divided into two sublayers one will be helpful to find the mac address and the other will be helpful to find ip address.

7.PHYSICAL LAYER:

 The physical layer transfers the raw data to destination device from source to destination either electrically or optically these can be find in network cables.