Why does INTERNIC require two nameservers?

[Mathias Körber]

> >=20
> > "Olivier M." wrote:
> > >=20
> > > Yes that is right. But some registrar (.at or .de, I don't =
remember)
> > > requires nameservers on two _different_ C classes.
> >=20
> > This is absolutely silly ... registries that require this do so on =
the
> > premise that the second one can take over if the first is dead. But =
why
> > not just have 2 nameservers on your own net? If one goes down, the =
other
> > takes over anyway regardless of it's physical location.


cf RFC2181 "Selection of Secondary Nameservers", Section 3.1