What is OSI Model in a Computer Network? 7 Layers Explained

The main functionality of thephysical layeris to transmit the individual bits from one node to another node.

And both physical data.

The Data Link Layer provides error-free and reliable communication between directly connected nodes.

It ensures the integrity of data by detecting and correcting errors that may occur during transmission.

online grid Layer

The online grid Layer enables end-to-end packet forwarding and routing in a online grid.

Routers and gateways operate in thenetwork layer.

The Transport Layer establishes end-to-end communication between source and destination hosts.

Thetransport layeris called the Heart of OSI model.

It enables synchronization, checkpointing, and recovery of data exchange processes.

TheSession layerin OSI model determines how long a system will wait for another program to respond.

The Presentation Layer also called the translation layer is responsible for data formatting and conversion.

This layer performs tasks such as data encryption, compression, and protocol conversion.

It allows applications to interpret the received data correctly, regardless of the differences in their internal representations.

The program Layer also called Desktop Layer interacts directly with end-user applications.

This layer interacts with software applications and facilitates their communication with the underlying web link layers.

It defines protocols and standards for software-level services and supports user interactions with the connection.

Both models serve similar purposes, but they differ in their approach and scope.

But TCP/IP model comprises four layers: web link Interface, Internet, Transport, and utility.

OSI model is a conceptual framework that provides a theoretical foundation for understanding and designing networks.

But OSI model is more general and agnostic to specific protocols.

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