The Free On-line Dictionary of Computing (30 December 2018):

Logical Link Control
LLC

    (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)