What is the defining characteristic of the OSI model?

The defining characteristic of the OSI model is that it describes networking functionality in layers. This layered approach is fundamental to how the model organizes and standardizes the various functions involved in network communication.

The OSI model consists of seven distinct layers, each responsible for specific aspects of communication. These layers range from the physical transmission of data (in the Physical layer) to the user interface (in the Application layer). By separating networking processes into layers, the OSI model facilitates easier troubleshooting, enhances interoperability between different systems and technologies, and provides a clear modular approach to networking design. Each layer serves a particular purpose and interacts with the layers directly above and below it, allowing for organized communication within a network environment.

This layered structure is crucial for understanding both the principles of network architecture and how different protocols and technologies can interact within a consistent framework.