On Tue, 18 Dec 2001, Simon Bolduc wrote: > Running a 486/66 on a cable line - my router does 3mb/s without a hitch - > mind you I only ever see about 300KB/s max (instead of the 375KB/s I should > - but that has nothing to do with the router). Math below is wrong BTW > (sorry to be picky). 1 byte = 8 bits thus 62KB/s would equate to 496kb/s
Michael Leone <[EMAIL PROTECTED]> wrote: > > I routinely average 62KB (that equates to 620Kb) downloads. I don't think 8 bits per byte is necessarily a better number than 10. Just for comparison, a serial line's start and stop bits on 8N1 asynchronous characters yields an effective 11 bit-times per byte, plus TCP overhead. For TCP over ethernet, the rate is somewhere between an ideal 8.5 bit-times per byte and dozens of bits per byte, depending on how efficiently the protocol fills the packets, and what the MTU is. For ethernet over ATM (static ip on DSL) the additional overhead amounts to a line rate of roughly 10 bit-times per byte, optimally. I don't know if DSL bit rates are quoted for their ATM rate or the ethernet rate, but it looks to me like either of you could be right, depending on your assumptions. cf http://sd.wareonearth.com/~phil/net/overhead/ --------------------------------------------------------------------------- Jeff Newmiller The ..... ..... Go Live... DCN:<[EMAIL PROTECTED]> Basics: ##.#. ##.#. Live Go... Live: OO#.. Dead: OO#.. Playing Research Engineer (Solar/Batteries O.O#. #.O#. with /Software/Embedded Controllers) .OO#. .OO#. rocks...2k --------------------------------------------------------------------------- _______________________________________________ Leaf-user mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/leaf-user
