Data links are connections that allow the transfer of information between different systems or devices. They can be physical, like cables, or wireless, like Wi-Fi and Bluetooth. Data links are essential for communication in networks, enabling devices to share data efficiently. In computer networks, data links operate at the data link layer of the OSI model. This layer is responsible for error detection, data framing, and managing how data packets are sent and received. By ensuring reliable communication, data links play a crucial role in the overall performance of networked systems.