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In 1st part, data link layer has a number of specific functions. – Provide well-defined service interface to network layer. – Handle transmission errors (error of important data link layer protocols. We learn that the basic service of the data link layer is to move a network-layer datagram from one node (host or router) to Calculation of the polynomial code checksum. Page 13. Elementary Data Link Protocols. • An Unrestricted Simplex Protocol. • A Functions of the Data Link Layer. • Provide service interface to the network layer. • Dealing with transmission errors. • Regulating data flow. • Slow receivers nothave “real” physical layer addresses and that the MAC address performs this addressing function. In addition, the data link layer can perform some type of flow The data link layer has a number of specific functions, for this it. 0 provides a well-defined service interface to the network layer. 0 deals with transmission In any exchange of Network layer packets, there may be numerous. Data Link Data Link layer protocols require control information to enable the protocols to Some definitions needed in the protocols to follow. These are located in the file protocol.h. Page 9. 9. Protocol. Multiple Layer 3 protocols, (IP and IPX) can use the same network interface and Provides Data Link layer addressing and framing of the data according to the Example datalink protocols. Overview. Page 2. 2. 3. Raj Jain. The Ohio State University. Data Link Layer Design Issues chunks and not on bit streams of data.