CompTIA Cloud+ Practice Test

Data at rest in a RAID 5 storage array is considered to be what type of encryption?

1. End-to-end encryption

2. In-transit encryption

3. At rest encryption

4. Application-level encryption

The correct answer is: At rest encryption

Data at rest in a RAID 5 storage array refers to data that is stored and not actively moving between locations or being processed. At rest encryption specifically protects this stored data from unauthorized access by encrypting the data on the disk. This type of encryption is crucial in safeguarding sensitive information, such as personal data or intellectual property, from being accessed by unauthorized users, even if they gain physical access to the storage devices. In the context of RAID 5, where data is distributed across multiple disks with parity for redundancy, encryption at rest ensures that the data remains secure regardless of how it is stored or structured within the array. This standalone focus on protecting stored data situates at rest encryption as the most appropriate answer, highlighting its importance in compliance with data protection regulations and overall data security strategies. Understanding this concept emphasizes the necessity for organizations to implement encryption solutions that specifically address the vulnerabilities associated with data that is not in transit.