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Home > Archive > CCNA > February 2004 > PPP features
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| worrywarm 2004-02-25, 5:20 pm |
| a. error detection
b. error correction
c. looped link detection
ans: a,c
I know a for sure, but got different version of saying on b, never heard about c.
Does ppp perform error correction and looped link detection??
anyone knows?
Thanks !!! | |
| npo3po 2004-02-25, 8:25 pm |
| Yes, yes, yes, error detection, looped link detection, compression, multilink support, call setup, callback, and authentication are all handled by PPP's Link Control Protocol(LCP).
By the way know your two compression methods: stacker(uses more cpu) and predictor(uses more ram), also the two authentication methods, (1)password authentication protocol(PAP) sends passwords in clear text and only performs authentication once, at the start of link establishment, the other is (2)Challenge handshake authentication protocol(CHAP) and is much more secure, passwords are encrypted, and it performs authentication at the start of link establishment and also conducts periodic checkups on the link to the remote host.
Error detection happens at the data link layer, PPP is a data link layer protocol. Error CORRECTION occurs at the transport layer. | |
| worrywarm 2004-02-25, 8:47 pm |
| You made me pretty clear now 
Thank you, amir!
Again, good luck on your test and let us know how it going. | |
| Kitsune 2004-02-26, 10:01 pm |
| From what I have read, PPP is capable of Error Correction, but it is not enabled by default. This is one of the features that distinguishes it from other data-link WAN protocols. | |
| Boulware5 2004-02-26, 10:28 pm |
| PPP does provide error correction through the FCS (frame check sequence).
I think it *is* enabled by default. Can anyone confirm? |
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