subdomain authority??

[TIM MOORE]

This might be a simple question, I just haven't found the answer looking
through the archives.  I want to know if I can be authoritative for a
subdomain (eg. child.example.com) and still send requests for the parent
domain to a specific external server (example.com).  We currently run
DNS completely internal to the internet and I would like to be
authoritative for a subdomain and still have the requests for the parent
domain go to a public DNS server.  How would I do the config?  Would I
use a foward statement specifically for the parent domain, or would
requests naturally go to our fowarder because we do not have the
parent?

Thanks,
Tim

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