PPP: Link Configuration Protocol (LCP)

• Runs when link first brought up

• Negotiates link-level parameters:

  • max frame size
  • special characters to be escaped (besides flag & escape)
  • use of abbreviated PPP frame headers
    • default has address + control + 2 byte type to look like standard HDLC UI-frame
    • most links negotiate to omit address & control and to use 1-byte type field

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