What is the correct order of all layers of the OSI model?

The OSI (Open Systems Interconnection) model is a conceptual framework used to understand and implement network protocols. It consists of seven distinct layers that describe the functions involved in network communication. The correct order of these layers from the lowest level to the highest level is crucial for understanding how data is transmitted across a network.

The correct order is as follows: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This sequence represents the progression from the physical transmission of data (the Physical layer) to the application services that end users interact with (the Application layer).

In this order, the Physical layer is responsible for the actual transmission of raw data bits over a physical medium. The Data Link layer then packages these bits into frames and handles node-to-node data transfer. The Network layer is responsible for path determination and logical addressing, while the Transport layer ensures complete data transfer, manages error correction, and controls transmission policies.

Next comes the Session layer, which manages sessions or connections between applications. The Presentation layer formats and encrypts data for the Application layer, which is the topmost layer where user interfaces and application-level protocols operate.

Understanding this correct sequence is vital for grasping how different layers interact with one another and how data is processed through