In message
<D1AC4482BED7C04DAC43491E9A9DBEC3901E1628@BK-EXCHMBX01.blacknight.local>,
at 02:10:47 on Sat, 25 Jan 2014, Michele Neylon - Blacknight
<[email protected]> writes
I'm a bit confused by your assertions with respect to authoritative DNS.
Can you please provide examples of domains where the situation you described
could exist?
Eg:
"target domain name. In fact, for the sake of redundancy, a domain name may
have many
authoritative servers, spread around the world and also operated by different
companies."
{You know all this, so there's clearly some kind of terminology issue}
Each domain is supposed to have two Name Servers (maybe we could also
discuss whether that's a better, or more familiar, term to use in the
text). There's no reason why they have to be adjacent either physically
or on the same network (ie same AS). Best practice is supposed to be
that they should be separated, although many commercial hosting
companies appear not to.
An over-complicated alternative example is the domain ripe.net, which
has six such servers, only one of which is on ripe-ncc's network; the
others are at nic.fr, apnic.net, isc.org and arin.net.
http://mydnscheck.com/?domain=ripe.net
In the diagram on page 6 of the document (and onwards), it would assist
the reader a great deal if the 'example' website in question was not
something associated with IANA, because currently it gives the very
strong impression that IANA is hosting everyone's authoritative servers.
I would suggest finding a suitable candidate, that isn't confusingly
associated with any of the major I* organisations, with perhaps three
diverse name servers.
While not recommending it as the example for this paper, I note that
intgovforum.org appears to have one hosting provider, with name servers
on networks in Virginia, Georgia and Arizona.
--
Roland Perry
