On Mon, Nov 7, 2011 at 5:29 PM, Peter Green <email@example.com> wrote:
> I have read lots on the net about D.N.S. but can't quite figure this one
> out, I hope you can help.
Think of the global domain name system as a tree of nameservers, with
different name servers for .uk, .co.uk, example.co.uk and so on. The
NS records tie those levels together. The .co.uk nameserver holds an
NS record for example.co.uk for example, so that a client can ask the
.co.uk nameservers where to ask questions about example.co.uk
Are you asking why a DNS zone needs to contain it's own NS records -
ie. when you've reached the right name server, why does that server
still contain an NS record for itself? IIRC it's so that the server
can send DNSNOTIFY to it's 'peer' nameservers.
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