The PRIMARY purpose of implementing Redundant Array of Inexpensive Disks (RAID) level 1 in a file server is to:

A.
achieve performance improvement.

B.
provide user authentication.

C.
ensure availability of data.

D.
ensure the confidentiality of data.

Explanation:
RAID level 1 provides disk mirroring. Data written to one disk are also written to another disk. Users in the network access data in the first disk; if disk one fails, the second disk takes over. This redundancy ensures the availability of datA . RAID level 1 does not improve performance, has no relevance to authentication and does nothing to provide for data confidentiality.