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, ranging from physical transmission of data to application-level interactions. These layers are: Physical, Data Link, Network, Transport, Session, Presentation, and Application. By using the OSI model, developers and network engineers can design and troubleshoot networks more effectively. Each layer interacts with the layers directly above and below it, allowing for modular development and easier integration of different technologies. This standardization promotes interoperability among diverse systems and devices.