V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

LCP
       [PPP] Link Control Protocol (PPP, RFC 1570)


V.E.R.A. -- Virtual Entity of Relevant Acronyms (February 2016):

LCP
       [Sair] Linux [and GNU] Certified Professional (Linux, GNU, Unix)


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

Link Control Protocol
LCP

    A protocol used to automatically agree upon
   encapsulation format options, handle varying packet size
   limits, authenticate the identity of its peer on the link,
   determine when a link is functioning properly and when it is
   defunct, detect a looped-back link and other common
   misconfiguration errors, and terminate the link.

   [RFC 1570].

   (1997-05-10)