Path: utzoo!mnetor!uunet!husc6!bbn!uwmcsd1!ig!agate!saturn!eshop
From: eshop@saturn.ucsc.edu (Jim Warner)
Newsgroups: comp.dcom.lans
Subject: Re: barrelled ethernet (yellow) coax
Message-ID: <1846@saturn.ucsc.edu>
Date: 5 Feb 88 16:31:31 GMT
References: <95@richp1.UUCP>
Reply-To: eshop@saturn.ucsc.edu (Jim Warner)
Distribution: comp.dcom.lans
Organization: University of California, Santa Cruz
Lines: 16
Keywords: cable length restriction

In article <95@richp1.UUCP> robert@richp1.UUCP (Robert Miller) writes:
>Note however, that the max point-to-point distance between any two
>nodes that you want to link should not exceed 1000m.  Also, there
>should be a max of two repeaters/routers between any two nodes that
>you want to link.
>
The max distance between two transceivers is 2500 m (plus a little
more for transciever cables).  The max number of repeaters in the
path between any two stations depends on whether you use IEEE 802.3
repeaters or Ethernet version 2 repeaters.  For the former, the 
max is four.  This is one area where V.2 and 802.3 differ significantly.

The Ethernet and 802.3 specs do not address the situation where
multiple Ethernets (with repeaters) are connected by routers or
other store and forward packet switches.  But "routers" is what
the NSFNet backbone is made of, and it spans the whole country.