In a message dated: Mon, 08 Oct 2001 15:05:24 EDT
Benjamin Scott said:

>  In theory, it will work that way.  Personally, I want to move to Theory.
>Everything works in Theory.  :-)

Good point :)  Let me know when you get there, I'm curious if Theory 
lives up to their marketing literature ;)

>> The 10Mb ethernet spec I believe calls for 10Mb HD, whereas the 100Mb
>> spec calls for 100Mb FD.
>
>  The 100 Mbit specs do not require FDX.  They do not even require
>auto-negotiation.  It is quite possible to have a single-speed, half-duplex,
>100 Mbit/sec repeater (which will not even work at 10 Mbit).

Hmmm, seems I chose my words poorly.  What you say is quite true.  
What I meant to express was that within the spec the example 
implementations are HDX for 10Mb and FDX for 100Mb, simply because at 
the times of writing, the cabling media then prevalent were capable 
of those transmission characteristics. 

But, as you point out, the spec doesn't dictate either, it merely 
outlines what can be done.

>  You also need equipment capable of handling it.  In particular, you cannot
>do FDX with a repeater.  You need a switch.

Correct, though, is there anything actually prohibiting a repeater 
from using FDX, or is it simply that the manufacturers wish to keep 
things simlpe and therefore cheap?

>People cannot seem to understand why their $5 Ethernet adapter
>with no documentation and a hand-lettered floppy disk doesn't
>work right.  :-)

Well, this pretty much goes for everything, right?  Pay $5 for a NIC 
or $10 for hub, you get the same quality one should expect with 
anything you get at [Wal, K]Mart/Radio Shack, right?  If you want 
quality, you must be willing to pay for it (OSes excluded ;)


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