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000288_news@newsmaster….columbia.edu _Mon Nov 17 11:10:56 1997.msg
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From: fdc@watsun.cc.columbia.edu (Frank da Cruz)
Newsgroups: comp.protocols.kermit.misc
Subject: Re: Why?
Date: 17 Nov 1997 16:10:55 GMT
Organization: Columbia University
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References: <64ntvm$5vs@dragon.synet.edu.cn> <EJr06C.GoA@iglou.com>
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In article <EJr06C.GoA@iglou.com>,
J. Wakeley Purple <wakep@iglou2.iglou.com> wrote:
: In article <64ntvm$5vs@dragon.synet.edu.cn>, Eastern ������ wrote:
: > I often hear kermit is very slow, but there also many people use it.
: > Why?? What's the Kermit good at??
: >
: Kermit is slow when it's set up with paranoid parameters like 97-byte
: packets, etc. Usually this is a result of a non-columbia implementation
: of the protocol or not reading the book.
:
: Slow is a relative thing, too. Some file transfer protocols fail
: completely (speed = 0) where kermit works fine when set up properly.
:
: At best it performs as well or better than almost all competitors.
: Check out the info at Columbia U.
:
: It's _very_ good at communicating between different operating system
: platforms and through routing/gateway situations where control chars
: wreak havoc with most file transfers.
:
Right. Most other protocols are either robust or fast, but not both.
Basic Kermit is robust by default, and can be tuned to be as fast as the
connection permits (i.e. within the limits of its noise, delay, flow-control,
buffering, and transparency limitations), and even so, remains quite robust
and recovers efficiently from transmission errors.
It was designed originally assuming the very worst about the connection.
Our challenge over the ensuing years has been to make it perform better and
better on *good* connections without giving up the robustness.
You can read all about Kermit software and the Kermit Project at the Kermit
website:
http://www.columbia.edu/kermit/
and you find answers to questions like the one above in our FAQ:
http://www.columbia.edu/kermit/faq.html
ftp://kermit.columbia.edu/kermit/faq.txt
- Frank