Question : "5-4-3" rule

Hi everybody,  " The 3-4-5 rule is designed to limit the physical size of the collision domain to ensure that any collision is detected before the sending station thinks it has successfully completed transmission of the smallest legal packet. " I want to know why there should be 2 segments without stations ?
Thanks,
Edgard.

Answer : "5-4-3" rule

Hi edgardvieira,

This is my epilog for this question.
You may want to check this book out.

Ethernet: The Definitive Guide
By Charles E. Spurgeon
1st Edition February 2000
ISBN: 1-56592-660-9

excerpts can be found @ http://www.ethermanage.com/ethernet/edg/edg.html

With chapter 7 & 13
http://www.ethermanage.com/ethernet/10quickref/ch7qr_1.html
http://www.ethermanage.com/ethernet/ch13-ora/ch13.html

a lot of deals with the signal processing I think you may have been looking for to answer your questions.  I assume that your opening question may be a prelude to why a lot of the old ethernet specs were created.  
Its interesting reading, but for me much of those specs have been superceded by many of the specs that keep a present day WAN and email system operational.

Hope it helps.