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Re: What do people use public suffix for?
From: Dave Crocker <dhc2 () dcrocker net>
Date: Fri, 19 Apr 2013 13:49:33 -0700

On 4/19/2013 12:57 PM, Tony Finch wrote:
To reinforce Joe's point, there doesn't even need to be a zone cut for
there to be an administrative cut. There are various ISPs and dynamic DNS
providers that put all their users in the same zone, and the common suffix
of a zone like this should be treated as public suffix even though there
is no zone cut.

Zones are nice constructs for partitioning operational management of DNS data, but I believe they were not intended to impart semantics about organizational boundaries.

The fact that they often correlate moderately well makes it easy to miss the facts that a) that's not their job, and b) the correlation isn't perfect. And the imperfections matter.

That is why there is the current interest in developing a cheap, accurate method that /is/ intended to define organizational boundaries.

 Dave Crocker
 Brandenburg InternetWorking

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