🚀 go-pugleaf

In article <1992Apr3.164945.18201@menudo.uh.edu>, bchs1b@Elroy.UH.EDU (Michael Benedik) writes:
|> In article <3740@wet.UUCP>, brand@wet.UUCP (Graham Brand) writes:
|> >Is anyone aware of any publication which has compared the performance of
|> >the more popular file transfer protocols? The particular ones with
|> >which I am concerned are kermit and xmodem (all variants).
|> >
|> >I am interested and concerned about this because, even with a
|> >9600bps modem I get an average transfer rate of less that 2000bps!
|> >Now I have heard of overhead but this is ridiculous!
|> >
|> >Cheers,
|> >-Graham Brand ( ..!hoptoad!wet!brand )
|> 
|> Transfer rates can approximately be summarized as
|> 
|>   Zmodem >> Ymodem > or = Xmodem > kermit
|> 
|> zmodem is really the best. Xmodem is not bad but I have lots of
|> problems doing xmodem transfers between my VAX and my PC. It isn't
|> doing something right with zipped and arced files. Kermit always
|> works like a champ but is slow. 

The above is true. But if your 9600 baud modem has V.42 (error correction)
or the older MNP 1-4, you can use a much faster protocol Y-MODEM-G. This
protocol has no error correction and assumes both modems at either end have
and have negotiated V.42. It is faster than Zmodem. Also if you can find it,
there are two good bidirectional protocols available that I am aware of
BIMODEM, and HSLINK. Both allow to send and receive simultaneouly.

-- 

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  ---  --- 	Frank Pikelner
  \    \  \	Technical Assistant
   \-   \--	York University (Toronto, Canada)
    \    \	Internet: frank@cs.yorku.ca
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