Hosting multiple TLDs

[Mark_Andrews at isc.org]

> That is _good_ practice.  _Best_ practice is for all of the intermediate
> domain names to be subdomains of the domain being delegated itself.  (For
> example, all of the intermediate domain names used in the delegation of
> "gwu.edu." would be subdomains of "gwu.edu." itself.)  The reason for this is
> that it allows server softwares such as BIND, "tinydns", and Microsoft's DNS
> server to continually refresh the cached delegation information with each
> response that they send.

	Actually they don't cache this information.  It would be nice
	if they could but too many administators fail to turn off /
	update the old servers when they make changes in the delegation.
	This leads to server lock.  Both BIND 8 and BIND 9 have explicit
	code to prevent this.

	Mark
--
Mark Andrews, Internet Software Consortium
1 Seymour St., Dundas Valley, NSW 2117, Australia
PHONE: +61 2 9871 4742                 INTERNET: Mark.Andrews at isc.org