[118154] in North American Network Operators' Group
Re: ISP customer assignments
daemon@ATHENA.MIT.EDU (Joe Abley)
Tue Oct 13 08:16:01 2009
From: Joe Abley <jabley@hopcount.ca>
In-Reply-To: <4AD46D11.3000702@emanon.com>
Date: Tue, 13 Oct 2009 08:14:59 -0400
To: swm@emanon.com
Cc: NANOG <nanog@nanog.org>
Errors-To: nanog-bounces+nanog.discuss=bloom-picayune.mit.edu@nanog.org
On 2009-10-13, at 08:05, Scott Morris wrote:
> While I may agree that teaching classful routing is stupid, the
> addressing part lets people start getting the concept of binary.
That's true of classless addressing, too. When students have problems
with non-octet bit boundaries, that just means you start with mask
lengths that are multiples of 8.
> While
> I'd love to think that people coming out of the school system have a
> grasp of simple mathematical skills, more and more I'm finding that's
> not the case. I wouldn't spend a LOT of time with it, and I
> certainly
> wouldn't LEAVE at classful addressing, but it's a foundational step.
>
> Why is the presumption faulty?
You were suggesting that classful addressing is reasonable to teach
because it's simpler. It's not simpler, and in a modern-day context
it's just wrong.
Joe
