The creation of a trust between external forests or domains depends on both sides of the trust (domains or forests, as applicable) being able to resolve the forest or domain names on each side of the trust. Which DNS configuration is most commonly used in the real world?
A) Configure conditional forwarders
B) Configure a shared DNS server
C) Configure secondary zones
D) None of the above

A) Configure conditional forwarders

Explanation:

Based on the information provided within the question it can be said that the most commonly used DNS configuration is known as Configure conditional forwarders. These are DNS servers that only forward queries for specifically defined domain names, instead of forwarding all queries that it cannot resolve locally.

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