What aspect of data protection refers to maintaining a copy of data?

The correct choice is focused on the principle of maintaining a copy of data to ensure that it can be restored in case of loss or corruption. Backup specifically refers to the process of creating duplicate copies of valuable data, which can be kept in different locations or formats for recovery purposes. This is a fundamental component of data protection strategies, as it provides a safeguard against data loss due to various factors such as system failures, human errors, or malicious attacks.

In contrast, disaster recovery encompasses a broader set of strategies and procedures to recover information systems after catastrophic events, which may include backups but also considers critical business operations and infrastructure restoration. Cyber recovery specifically targets recovering data after a cyber attack, emphasizing security measures, while data archiving involves the long-term storage of infrequently accessed data for compliance or record-keeping, rather than the immediate recoverability provided by backups.