What is the proper way to allow the Vault to resolve host names?

What is the proper way to allow the Vault to resolve host names?
A . Define a DNS server.
B . Define a WINS server.
C . Define the local hosts file.
D . The Vault cannot resolve host names due to security standards.

Answer: A

Explanation:

Reference: https://docs.cyberark.com/Product-Doc/OnlineHelp/PAS/Latest/en/Content/PAS%20INST/Configuring-Transparent-User-Management.htm