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Should DNS server address of "127.0.0.1" be used when specifying same server as primary DNS server?

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Last Modified: 2021-04-12
When adding the DNS server address of a server (and the server itself is a DNS server), is it preferable to add the IP address as "127.0.0.1" or should the server's actual IP address of 192.168.10.20 be used?

I have seen both types of IP addresses used and am wondering if there is an advantage of using one over the other or if there are any problems with using one IP address format over the other one.

This is in a Server 2016 environment.
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