[118256] in North American Network Operators' Group

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RE: ISP customer assignments

daemon@ATHENA.MIT.EDU (Brian Johnson)
Fri Oct 16 16:59:28 2009

Date: Fri, 16 Oct 2009 15:58:34 -0500
In-Reply-To: <8B29BFB1-38D3-43F1-A081-E9182D1F7656@t1r.com>
From: "Brian Johnson" <bjohnson@drtel.com>
To: "NANOG" <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org

I actually think that CIDR is easier to understand than classful
addressing. Do the subject completely in binary. It makes complete sense
then.

- Brian

BTW: If the grad students don't get it, fail them! I don't want an
engineer who can't grasp basic binary math.


> -----Original Message-----
> From: Daniel Golding [mailto:dgolding@t1r.com]
> Sent: Friday, October 16, 2009 3:51 PM
> To: Joe Abley
> Cc: NANOG
> Subject: Re: ISP customer assignments
>=20
>=20
> The big problem here is that CIDR is tough to teach, even to
> engineering students. This seems bizarre and counterintuitive, but its
> true. I know this because I've done it. Its really easy to teach
> classful addressing, on the other hand. Other problems include the
> issue that many of the folks teaching have never had to use CIDR in
> real life, textbook age, and, in some cases, lack of mathematical
> preparation and inclination on the part of students.
>=20
> Scarier: I was teaching graduate students.
>=20
> - Dan
>=20


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