LCP

Each letter in the term LCP is pronounced separately and the term LCP is an acronym for Link Control Protocol and this protocol is a part of PPP or point to point protocol. The Point to Point protocol works on the concept of sending out packets which would provide with the information which will be used to decide that whether a connection to send the data should be made or not. The packets that are sent out in this process, before the connection is made, are the LCP or Link Control Protocol packets. These packets also determine the standards of the ensuing data transmission.

When viewed logically the LCP is a transport layer protocol however, when it is implemented in the networking world it occurs as the data link layer in the network stack. There are several things that the LCP protocol does in the network. They are mentioned ahead. The first thing LCP does is that it checks the identity of the linked device, and depending upon the authentication process; it either accepts the device or rejects it. 

The second thing that this protocol does is that, it determines the acceptable packet size that can be transmitted easily to the peer device from the source, and the packet size is determined depending upon the specifications of the network. The third function performed by LCP is that it searches for errors in the configuration of the peer devices, so that these errors can be removed and the device can work efficiently and without a problem. The fourth thing done by this link control protocol is, it has the authority to terminate a link if the requirement of the link exceeds the parameters.

These are the four main functions performed by the LCP and the PPP cannot form a connection as long as these four conditions are met. It so happens that the LCP is embedded in the PPP, therefore a basic PPP connection is often established, for as long as the LCP comes in action and reconfigure the link made.