Data Link Control

The Data Link Layer provides Data Link Control as a service to ensure reliable data transport over the physical media. In half-duplex transmission mode, for example, one device can only transmit data at a time. If both devices at the end of the link transmit data at the same time, they will collide, resulting in information loss. The data link layer ensures that the devices work together to avoid collisions. Data Link Control and Media Access Control are the two major roles of the Data…