I have a question regarding the max length for a 100BaseT cable. Granted I
haven't done a wealth of research on this so feel free to point me to
google if the answer is mind numbingly simple, which it probably is....

I have always understood the 100M limitation on 10BaseT ethernet cable to
be attributable to the time it would take a collision signal - assuming you
are running at half duplex - to be returned in time to prevent the next
packet from being sent. In other words any longer than 100M and the sending
station would not get the message in time that there had been a collision
and thus continue sending packets instead of backing off. I have heard
attenuation mentioned, but not as the "real" reason for the distance limit.

My question is given that many stations are running 100 full duplex these
days - thus removing the collision concerns - does this effectively change
the maximum distance for cable runs? Or is attenuation truly a factor in
anything over 100M?

In general I am referring to standard Cat5 cabling....

Just curious...




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