Re: Re: Grading system in uk

In reply to sam@xxxxxxxxxxx (Sam Nelson)'s previous message, included
herein,

>In article <ndo2i1df9lmqj84ak5p7th2rsec3lj8qs1@xxxxxxx>,
> DHP <me@xxxxxxxxxxx> writes:
>> That's odd, I don't remember saying anything about your work *except*
>> that Google Science and other references to reflections don't make
>> sense for a medium designed to eliminate them.
>
>You made disparaging remarks about computing in general which didn't display
>any particular grasp of the subject.

Thats' because, as I have said, I don't know much about it.

>I'm no electronics whizz, and I don't care who knows it.

>> A correctly terminated ethernet won't have significant reflections.
>
>That was precisely what I meant. When your net stopped working and you
>suspected a break or a short, you got your TDR out, plugged it into the
>end of a segment, and it told you how far away the break/short was. I
>assume it did that by measuring reflection times.

Yes

>Its fundamental weakness
>was that you had to disconnect every station from the segment first, and
>you usually found what was usually a break while doing that.

>> I can't see 2.5m between MAUs being written into the spec purely to
>> allow low-performance reflectometers to read something back. Can you?
>
>No. 2.5m minimum between MAUs was something to do with being able to do
>collision detection, not broken-cable detection.

That's what "Huge" said. I haven't found any reference to it, but I am
still hoping. However, given that MAUs start to talk at *random*
times, there's no *obvious* way a space makes any difference.

.

Relevant Pages

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