[rescue] Re: CDDI/FDDI from Cisco (old stuff--any good?)

Greg A. Woods rescue at sunhelp.org
Mon Aug 20 14:14:59 CDT 2001


[ On Monday, August 20, 2001 at 13:03:11 (-0400), Al Potter wrote: ]
> Subject: Re: [rescue] Re: CDDI/FDDI from Cisco (old stuff--any good?) 
>
> How do you tell the difference between half and full duplex?

You can either tell your switch and/or NICs what to use, or they can
tell you what they auto-negotiated....

>From a user's perspective you may not notice much, though if you have
the need and the means you can send and receive data simultaneously
between two hosts on the same network at well over twice the speed with
full-duplex Ethernet as you would be able to on a traditional CSMA/CD
(half-duplex) Ethernet.

(it's well over a 2x factor because of the Ethernet CSMA/CD algorithm
causing random backoff timeouts)

-- 
							Greg A. Woods

+1 416 218-0098      VE3TCP      <gwoods at acm.org>     <woods at robohack.ca>
Planix, Inc. <woods at planix.com>;   Secrets of the Weird <woods at weird.com>



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