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Would their toplevel dns be more likely to forward to external dns (and 404) or to all known intranet DNS servers? In a typical corporate environment.
– jiggunjer
Commented Apr 8, 2020 at 9:16
1

@jiggunjer: I'm not sure if "more likely" actually makes sense... it's not exclusively one of those options, but rather a bit of "both" and a bit of "neither". The central DNS server won't just fling the same request to all intranet servers and hope that one of them knows the answer. Either it recognizes the domain because it was told exactly which DNS servers are supposed to handle it (and forwards the query only to those servers), or it doesn't recognize the domain at all (and forwards the query to external DNS).
– grawity_u1686
Commented Apr 8, 2020 at 16:06

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