The Open Systems Interconnection (OSI) model is a conceptual framework used to understand and standardize how different networking systems communicate. It divides the communication process into seven distinct layers, each with specific functions: Physical, Data Link, Network, Transport, Session, Presentation, and Application. This layered approach helps in troubleshooting and designing networks by allowing different systems to work together seamlessly. Each layer of the OSI model interacts with the layers directly above and below it, ensuring that data is transmitted efficiently from one device to another. For example, the Transport layer is responsible for ensuring reliable data transfer, while the Application layer provides network services to end-user applications. This structure promotes interoperability among diverse systems and technologies.