In the OSI Model, which layer is responsible for data transfer between network devices?

The layer responsible for data transfer between network devices in the OSI model is the Data Link Layer. This layer provides the means for transferring data between adjacent network nodes and ensures that data packets are transmitted to the appropriate hardware address on the local network segment. It manages how data packets are placed and detected on the physical medium, handling error detection and correction that might occur at the physical level.

The Data Link Layer plays a critical role in establishing a reliable link between devices on the same network segment. It frames the data from the Layer above (Network Layer) and adds necessary headers and trailers to create a data frame appropriate for transmission.

While the Network Layer is involved in routing data across networks and determining the best paths for transmitting packets between devices, it does not handle the direct data transfer between devices on the same local network segment, which is the main function of the Data Link Layer.