forwarding zone to another DNS server problem

[Frank Pikelner]

houguanghua <houguanghua at hotmail.com> wrote:
>
>> Can bind support forwarding zone to another DNS server? In my testing,
>> for loacl name servers, it can. But for authority name servers, it
>> can't.

>Use "stub" or "static-stub" to forward to an authoritative server.

What is the advantage of using a "stub" or "static-stub" to using a slave?

Thanks,

Frank