App vs. System DNS Hierarchy

Privacy & Security General
s-crypt OP
Created Sep ’20
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Can an app with the default privacy context 
Code Block swift
NWParameters.PrivacyContext.default...
override the selected System Wide DNS set by another app?
Also, are there any system queries that are not passed through the System Wide DNS?

These weren't made abundantly clear in the session looking back at it.
Thank you.

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DTS Engineer OP
Apple
Sep ’20

Can an app with the default privacy context … override the selected
System Wide DNS set by another app?

No. WWDC 2020 Session 10047 Enable encrypted DNS is pretty clear about this:

When you require encryption, you can provide a DNS server
configuration to use as a fallback. That means that any system-wide
DNS configuration will take precedence, but your app's fallback will
kick in otherwise.

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