The OSI Model is a seven-layer conceptual framework that standardizes how different network devices communicate.

Elaboration:

Each layer handles a specific networking function:

1. Physical Layer – Transmits raw data bits over cables or wireless signals.
2. Data Link Layer – Manages MAC addresses, switches, and error detection.
3. Network Layer – Handles IP addressing and routing.
4. Transport Layer – Ensures reliable delivery using TCP/UDP.
5. Session Layer – Manages session establishment and termination.
6. Presentation Layer – Formats, encrypts, and compresses data.
7. Application Layer – Interfaces with applications (HTTP, FTP, SMTP).

Example:

A user loading a website (HTTP) involves multiple OSI layers working together for seamless communication.