What layer of the OSI model handles the physical connection between devices?

The Physical layer of the OSI model is responsible for the physical connection between devices. It deals with the hardware aspects of networking, including the transmission and reception of raw binary data over a physical medium. This includes considerations such as electrical signals, light pulses, and radio waves, as well as the physical characteristics of the medium itself, such as cables and connectors. The Physical layer defines how devices are physically connected and communicates the information across these connections.

For instance, it specifies the types of cables (like coaxial, fiber optic, or twisted pair) that can be used and the maximum lengths for these connections. It also outlines how devices should transmit and receive signals over these physical connections, establishing the groundwork for further communication in higher layers. Understanding this layer is crucial for troubleshooting physical connectivity issues and ensuring proper network infrastructure.