The MAC sublayer, on the other hand, contains a number of distinct modules; each caries proprietary information specific to the LAN product being used. The MAC sublayer resolves the contention for the shared media. It contains the synchronization, flag, flow, and error control specification necessary to move information from one place to another, as well as the physical specification necessary address of the next station to receive and route a packet. MAC protocols are specific to the LAN using them.
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