Composition of Point-to-Point Protocol ppp

The Point-to-Point Protocol (ppp) consists of the following parts: link suppression Protocol: the LCP provided by PPP is comprehensive and practical in most environments. LCP is used to actively unify encapsulation style options, process packet size limitations, detect loop links and other idle combinations, and terminate links. Other optional functions provided by LCP are: authenticate the identity of the same unit in the link and determine whether the link function is normal or the link fails. Network blocking Protocol: a stretching link blocking protocol for the generation, matching, testing, and discipline of data link connections. Encapsulation: a measure to encapsulate multi-protocol datagram. PPP encapsulation provides multiplexing techniques for unified link transmission at different network layers. PPP encapsulation focuses on the design and can adhere to the acceptance of most common hardware. A multi-purpose, Point-to-Point Protocol that overcomes the limitations of SLIP. The WAN data link encapsulation service provided by SLIP is similar to the sealing service provided by LAN. Therefore, PPP not only provides frame demarcation, but also provides protocol identification and bit-level comprehensive inspection services. Combination: the easy and self-made mechanism of the Link Control protocol is used. This mechanism also applies to other blocking protocols, such as network blocking protocols (NCP ). The link www.2cto.com will keep the communication settings unchanged until LCP and NCP packets close the link. It may be when some surface events occur (for example, when the timer expires, the network administrator may ask questions ). For point-to-point Link communication, each end of the PPP link must first send an LCP packet to set and test the data link. When a link occurs, the optional functions required by the LCP are selected, and then the PPP sends an NCP packet to select and set one or more network layer protocols. Once each selected network layer protocol is set, the datagram from each network layer protocol can be sent on the link. Application: it is assumed that a "dial-up connection" was created in Windows 98 ". Set the PPP protocol through the following measures: first, open the "dial-up connection" attribute, and select the "server type" tab. Then, select the default "PPP: Internet, windows NT Server, Windows 98 ", other options of this protocol can be set in advanced options; finally, click" OK. Author ye mengmo yuan h