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Found one definition

1.                 From The Free On-line Dictionary of Computing (19 January 2023):
                   
   
   
                   
                     
   Logical Link Control
   LLC
      <networking> (LLC) The upper portion of the data link layer,
      as defined in IEEE 802.2.  The LLC sublayer presents a
      uniform interface to the user of the data link service, usually
      the network layer.  Beneath the LLC sublayer is the Media
    Access Control (MAC) sublayer.
      (1995-02-14)