Final answer:
The correct answer is 4) All of the above, as RAID is a storage technology that combines multiple disk drives into a single logical unit and provides fault tolerance and improved data storage performance. It can be implemented in various levels like RAID 0, RAID 1, RAID 5, etc.
Step-by-step explanation:
The student's question deals with understanding the concept of RAID (Redundant Array of Independent Disks). The correct answer to the question is: 4) All of the above.
RAID is indeed a storage technology that combines multiple disk drives into a single logical unit for the purposes of data redundancy and performance improvement. It provides fault tolerance by ensuring that the data can still be recovered in case one of the disks fails. This is achieved through various means depending on which RAID level is used. Additionally, RAID can indeed improve data storage performance, particularly in configurations that allow for striping, where data is distributed across multiple disks to allow for faster access. Finally, it is true that RAID can be set up in different levels, each with its own balance of performance, data availability, and storage capacity. Commonly referred to levels include RAID 0 (striping), RAID 1 (mirroring), RAID 5 (striping with parity), among others.