Your company is connected to the Internet, correct? So what WAN protocol do you utilize to connect to the Internet? Chances are that if you have a T1 leased line to the Internet or a private network between locations, you would be utilizing one of these three WAN Protocols: HDLC, PPP, or Frame-relay. We would be talking about the PPP Protocol, and if you wish to have more knowledge about the same, you are required to gain the courses offered at the SPOTO Club.
What is PPP?
PPP is considered to be a WAN protocol that would be working at layer 2 by encapsulating frames for transmission over a variety of physical links like the serial cables, cell phones, fiber optic cable among others. It would be offering many more features as compared to HDLC and it is also an open standard. Some of the features that it would be offering which aren’t available in HDLC include:
- Link quality management which is considered to be a way to monitor the quality of a link in PPP. When PPP would be detected too many errors on a link, the link is shut down.
- Authentication utilizing PAP and/or CHAP
PPP operation would be made utilizing three parameters:
- Encapsulation of frames utilizing HDLC protocol
- LCP (Link Control Protocol) for the establishment, configuration, and testing of the link
- NCP (Network Control Protocols) to negotiate the various layer 3 protocols.
Link Control Protocol (LCP)
This is considered to be the main protocol that PPP would be utilizing for its operation. LCP would be working on top of layer 1 and it would be working by testing, establishing and configuring the physical connection. It would be also negotiating other WAN options that would be handled by the NCPs. LCP configures the link in the ways which are listed below:
- Determining transmission of different packet sizes
- Detection of misconfiguration errors
- Termination of the link
- Determination of link failure
LCP is also used to negotiate parameters of encapsulation and other PPP configuration options like the authentication, error detection and compression when the link has been established.
Network Control Protocol Layer
NCPs are protocols that allow PPP to use different layer 3 protocols such as IP, IPX and Apple Talk.
Establishing a PPP Session
When establishing a PPP session, LCP would be negotiating the PPP configuration options at either point of the link. This is completed when acknowledgment frames are sent. The second step would be typically optional and it is where LCP tests the link to ascertain whether it would have been needed quality to support the various layer 3 protocols. Finally, NCP is considered to be used to configure the layer 3 protocols that are in use.
Now that we have learned the workings of PPP, we can go ahead and configure it. In your lab, all the options for the PCs and the interfaces connecting to the routers from the PCs which would be configured. The routers have been correctly configured as well as our task would be only to configure the PPP options on the serial links. The lab requires that we configure basic PPP and successful completion of the lab will be determined by the verification commands we learned earlier.
You have acquired the knowledge about the PPP Protocol of WAN. If you wish to have more knowledge about the same, you could have it through the training courses, which would be offered at the SPOTO Club. When it comes to the IT Certification, SPOTO is considered to be the best. They have a team of experts who design their courses and also provide the passing guarantee to the course takers.