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- Newsgroups: comp.archives.msdos.d
- Path: sparky!uunet!zaphod.mps.ohio-state.edu!moe.ksu.ksu.edu!usenet-feed.cc.umr.edu!mcs213e.cs.umr.edu!mcastle
- From: mcastle@mcs213e.cs.umr.edu (Michael R Castle)
- Subject: Re: *** WHAT'S THE BEST COMM PROTOCOL ***
- References: <1992Dec21.181829.4391@porthos.cc.bellcore.com> <1992Dec21.195526.29197@uwasa.fi>
- Date: Tue, 22 Dec 1992 05:21:52 GMT
- Nntp-Posting-Host: mcs213e.cs.umr.edu
- Organization: University of Missouri - Rolla
- Sender: cnews@umr.edu (UMR Usenet News Post)
- Message-ID: <1992Dec22.052152.9839@umr.edu>
- Lines: 45
-
- In article <1992Dec21.195526.29197@uwasa.fi> ts@uwasa.fi (Timo Salmi) writes:
- >In article <1992Dec21.181829.4391@porthos.cc.bellcore.com> dml7@navaho.cc.bellcore.com (lee,danny) writes:
- >>i'm having trouble deciding which communications protocol package to
- >>use on my pc. i was using kermit and still using it. however,
- >>someone mentioned to me that zmodem was much better and faster.
- >
- >The answer is rather unambiguously zmodem. If one speaks of the
- >different telecommunications packages, there are many of them in
- >use, and the opinnions can be quite divided. But as for file
- >transfers zmodem seems to dominate in actual usage. I am not being
- >partisan, but rather observing the current practice.
- >
- >If one goes down to details, all transfer protocols have their
- >proponents, and if you can lay your hands on kermit with long
- >packages, it is fair, too. But it has one drawback which I don't
- >like at all. That is that it does not preserve the file's date
- >stamp in the transfer.
-
- I'll probably go check out the kermit newsgroup after I post this, but
- I think it might be relevant here too.
-
- Has anyone heard of/used a new addition called SuperBlock Kermit? I believe
- it was originally developed for use with the unix clone Coherent, and has
- since been ported to the NeXT platform as well.
-
- Now, I'm not sure on the details, but supposedly it's a streaming protocol
- like zmodem. Zmodem (and I may be wrong here, so feel free to correct me),
- when it determines that it's received a bad block (via CRC checks?), it
- signals the sender to restart at block such-and-such, and start over from
- there. Evidently the new kermit, instead of resending everything from
- that block on, justs asks for that specific block. So, if you do have
- and err, it tries to just fix that one block rather than starting over.
- As a result, it's supposed to get better transfer rate than zmodem. Of
- course, I still don't know anything about crash recovery (that is,
- picking up from where you left off after an aborted transfer, zmodem
- may still be better for that).
-
- Does anyone know if this is true, and if so, where I can get binaries for
- DOS and source for unix?
-
- Like I said, this may be better asked in the kermit group, but it might
- be of interest to people here as well.
-
- regards,
- mrc
-