OSI Model

What is OSI Model?

OSI model stands for Open Source Interconnection Model. OSI Model is a framework that is made to interpret the functions of the networking system. The purpose of the OSI model is to guide vendors and developers and give them a clear framework that describes the functions of networking. OSI model consists of 7 layers and each of them has its own functionality. Let’s discuss the 7 layers of the OSI model.

7. Application

The application layer regulates which protocol to use for the communications between the networks. In this layer, the host receives information and it displays it on the screen.

6. Presentation

The presentation layer formats and translates the data for the next layer of the OSI model. This layer includes encryption and decryption of data.

5. Session

The session layer controls the discussions between various computers. It includes resources of reconnection and verification, and this layer controls how long the system takes time to respond to the application.

4. Transport

The transport layer regulates how much data to send, where it gets sent, and at what rate data is to be sent. It is responsible for error checking and data flow control.

3. Network

This layer is about sending the data packages to the right address. This is done by data taking the right routes to reach its destination. This layer permits layer 4 to proceed.

2. Data

The data layer is when it is made sure that the bits that are sent throughout the physical devices do not give transmission errors. It is also made sure that the data sent does not flood the receiving devices and the outgoing devices. This layer allows layer 3 to proceed.

1. Physical

The physical layer is the layer when physical machines are used to transfer data; such as computers, phones, and other devices.