What term describes a redundant or extra copy of system data created for later recovery?

• A. Asset
• B. Backup
• C. Attack Surface
• D. Authentication

Answer: (B)

A backup is a redundant copy of system data created to enable recovery after data loss. This enables you to restore files, databases, or entire systems to a known-good state when data is corrupted, accidentally deleted, or compromised by malware or hardware failure. Backups are planned with recovery goals in mind, such as how recent the data needs to be (recovery point objective) and how quickly systems must be restored (recovery time objective). They can be full copies or rely on incremental or differential updates, and they may be kept on-site, off-site, or in the cloud, often maintaining multiple versions to guard against backup corruption. This concept is distinct from an asset (a valuable resource), an attack surface (the array of exposed entry points for an attacker), or authentication (verifying identity).