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data link layer

Source : Free On-Line Dictionary of Computing

data link layer
     
         Layer two, the second lowest layer in the {OSI}
        seven layer model.  The data link layer splits data into
        {frames} (see {fragmentation}) for sending on the {physical
        layer} and receives acknowledgement frames.  It performs error
        checking and re-transmits frames not received correctly.  It
        provides an error-free virtual channel to the {network layer}.
        The data link layer is split into an upper sublayer, {Logical
        Link Control} (LLC), and a lower sublayer, {Media Access
        Control} (MAC).
     
        Example {protocols} at this layer are {ABP}, {Go Back N},
        {SRP}.
     
        (1995-02-14)
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