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Link Control Protocol

From Wikipedia, the free encyclopedia

In computer networking, the Link Control Protocol (LCP) forms part of the Point-to-Point Protocol (PPP), within the family of Internet protocols. In setting up PPP communications, both the sending and receiving devices send out LCP packets to determine the standards of the ensuing data transmission.

The protocol:

  • checks the identity of the linked device and either accepts or rejects the device
  • determines the acceptable packet size for transmission
  • searches for errors in configuration
  • can terminate the link if requirements exceed the parameters

Devices cannot use PPP to transmit data over a network until the LCP packet determines the acceptability of the link, but LCP packets are embedded into PPP packets and therefore a basic PPP connection has to be established before LCP can reconfigure it.

LCP over PPP packets have control code 0xC021 and their info field contains the LCP packet, which has four fields (Code, ID, Length and Data).

  • Code: Operation requested: configure link, terminate link, and acknowledge and deny codes
  • Data: Parameters for the operation

YouTube Encyclopedic

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  • Lec 06 Data Link Control, Error Control, Flow Control and Sliding Window
  • HIGH LEVEL DATA LINK CONTROL (HDLC) PROTOCOL
  • Introduction to PPP(Point-to-Point Protocol)

Transcription

External links

  • RFC 1570: PPP LCP Extensions
  • RFC 1661: The Point-to-Point Protocol (PPP)
  • RFC 1663: PPP Reliable Transmission
  • Kozierok, Charles. "PPP Link Control Protocol (LCP)". The TCP/IP Guide. Retrieved 4 December 2014.
This page was last edited on 19 September 2022, at 17:44
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