What is the function of the primary and backup servers when configuring an authentication source in ClearPass?

What is the function of the primary and backup servers when configuring an authentication source in ClearPass?
A . The primary server and backup servers can be configured for round-robin.
B . The primary server can be from one Active Directory domain; the backup server can be from another.
C . The primary server is always authenticated first, then the backup is used if authentication fails.
D . The primary server is always authenticated first, then the backup is used if that times out.

View Answer

Answer: D

Explanation:

Reference: https://community.arubanetworks.com/t5/Security/CPPM-amp-AD-Questions-Re-Auth/td­p/74888