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Does the Windows DNS server support RTT when used for recursive dns queries?

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No RTT is not considered. See Using Forwarders

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So thats for forwarders, but it does not say for the other setups where it does recursive queries. This documents states it does:… but cannot find it anywhere on – GeorgeU Apr 5 '11 at 22:36
Sorry I misread the question. 2003 does so I would guess that 2008 does as well this link is for 2003 that mentions it. – Jim B Apr 6 '11 at 1:40

So it turns out they do support RTT - but hardcoded to 100ms (go figure)

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