NS record for the @ entry

[Michael Voight]

Edmund wrote:
> 
> Might be my concept is not clear.  The SOA, to my understanding,
> is used in the zone transfer between the primary DNS server and its
> secondary DNS servers, and the secondary DNS doesn't have a
> pre-configured SOA entry because it will get it from primary DNS.
> But I don't understand why the @ entry has to have at least one
> NS record associated with it since its' parent zone name server
> already has a NS record pointing to it.  You mentioned that it's
> required because it's the definition of zone.  But I still don't understand
> why such definition is required and what it is used for.

This makes as much sense as "why do they call it an SOA record"
Because that is how the people that created DNS determined it should be.
It's required, let it go at that.

Michael