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