What Does The Data Link Layer Do?
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The data link layer is responsible for establishing reliable connections between adjacent nodes in a network. It does this by providing node-to-node delivery of frames and flow control of the data being transmitted. It also provides media access control, error detection and correction, and framing of data. The data link layer enables communication between physically connected machines, such as computers on a local area network (LAN).
The Data Link Layer is responsible for taking packets from the Network Layer (IP) and encapsulating them into frames. It adds headers to the frames to identify where they originated from, and where they are going. It also performs error–detection techniques to ensure reliable communication. Additionally, the Data Link Layer is responsible for managing the physical connections between devices on the network, including media access control and flow control.