🚀 go-pugleaf

:In article <MPG.10572b78acbc04c39896ca@ispnews.walltech.com>,
:Philip J. Koenig <For_Email@ddress.see.below_plea.se> wrote:
:>In article <01bdd698$fe212500$8028a8c0@jb.zedak.com>, jb@zedak.keepyourspam.com 
:>writes...
:>> Daniel Erskine <netsup75@edwardjones.com> wrote in article
:>> <35EACDBE.237D36B8@edwardjones.com>...
:..
:>
:>The reason that using correct cable is important are as follows:
:>
:>1 - Terminators and NIC's are 75 ohm, if the cable is not, you end up
:>    with reflections that play hell with the waveforms and thus, data 
:>    integrity.

    10base2 uses 50 ohm coax and 50 ohm termination.

:>2 - The reason distance is a factor (and why the IEEE specifies a 
:>    maximum length for 10base2 segments) is due to the rate of signal
:>    propagation.  Since 802.3 collision detection relies on a known rate
:>    of propagation and maximum segment length (tailoring it's "collision
:>    listen window" accordingly), if you run out-of-spec cabling you run
:>    the risk that collision-detection no longer works correctly, which
:>    causes a host of problems including runt packets, late-collisions, 
:>    etc.

    The collision window is not the maximum segment length,  It's the 
    preamble period plus I think the MAC header (don't quite remember but
    I think it's the first 64 bit times or something like that).  If
    a collision occurs after that point, you get a 'late collision' which,
    which detectable, is a very serious error.

						-Matt

:>Phil
:>
:>
:>-- 
:>Philip J. Koenig         The Electric Kahuna Organization          [see below]


-- 
    Matthew Dillon  Engineering, HiWay Technologies, Inc. & BEST Internet
                    Communications
    <dillon@best.net> (Please include original email in any response)