computer network A computer network is a set of computers sharing resources located on or provided by network nodes. The computers use common communication protocols over digital interconnections to communicate with each other. These interconnections are ...

ing, the Link Control Protocol (LCP) forms part of the Point-to-Point Protocol (PPP), within the family of

Internet protocols The Internet protocol suite, commonly known as TCP/IP, is a framework for organizing the set of communication protocols used in the Internet and similar computer networks according to functional criteria. The foundational protocols in the suit ...

. In setting up PPP communications, both the sending and receiving devices send out LCP

packet Packet may refer to: * A small container or pouch ** Packet (container), a small single use container ** Cigarette packet ** Sugar packet * Network packet, a formatted unit of data carried by a packet-mode computer network * Packet radio, a fo ...

s to determine the standards of the ensuing data transmission. The

protocol Protocol may refer to: Sociology and politics * Protocol (politics), a formal agreement between nation states * Protocol (diplomacy), the etiquette of diplomacy and affairs of state * Etiquette, a code of personal behavior Science and technolog ...

: * 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

External links

* : PPP LCP Extensions * : The Point-to-Point Protocol (PPP) * : PPP Reliable Transmission * {{cite web, last1=Kozierok, first1=Charles, title=PPP Link Control Protocol (LCP), url=http://www.tcpipguide.com/free/t_PPPLinkControlProtocolLCP.htm, website=The TCP/IP Guide, accessdate=4 December 2014 Link protocols Internet Standards