Understanding the OSI Model

Online Services Integration

Operating System Interface

Open Systems Interconnection

Open Source Initiative

3

10

5

7

Application layer

Network layer

Transport layer

Data Link layer

To establish physical connections between devices.

To manage network routing and addressing.

To encrypt data for secure transmission.

To provide reliable data transfer between devices.

Network layer

Transport layer

Application layer

Presentation layer

Internet Protocol (IP)

Transmission Control Protocol (TCP)

File Transfer Protocol (FTP)

Hypertext Transfer Protocol (HTTP)

Session Layer

Transport Layer

Data Link Layer

Network Layer

To provide node-to-node data transfer and error detection.

To encrypt data for secure transmission.

To route data between different networks.

To manage physical connections between devices.

Network layer

Transport layer

Data link layer

Application layer

The Physical layer encrypts data for secure transmission.

The Physical layer manages error detection and correction.

The Physical layer establishes end-to-end connections between devices.

The Physical layer transmits raw bitstreams over a physical medium.