Aloha data link layer

Examples of data link protocols are Ethernet, Point-to-Point Protocol (PPP), HDLC and ADCCP . In the Internet Protocol Suite (TCP/IP), the data link layer functionality is contained within the link layer, the lowest layer of the descriptive model, which is assumed to be independent of physical infrastructure.

The data link layer is the protocol layer in a program that handles the moving of data into and out of a physical link in a network . The data link layer is Layer 2 in the Open Systems Interconnection (OSI) architecture model for a set of telecommunication protocols.

The data link layer is responsible for multiplexing data streams, data frame detection, medium access, and error control . It ensures reliable point-to-point and point-to-multipoint connections in a communication network.