CISSP Question of the Week: File Backup

CISSP Question of the Week courtesy of Transcender Labs.

Your organization implements a full/differential backup scheme. A full backup was completed two days ago. Yesterday, a differential backup was completed.

Which files were backed up yesterday?

A. Files in a backup set
B. Files in a backup set that were changed or created since the last full backup
C. Files in a backup set that were changed or created since the last differential backup
D. Files in a backup set that were changed or created since the last incremental backup

Reveal Answer

The correct answer is B.

A differential backup backs up the files in a backup set that were added or changed since the last full backup. A differential backup type grows as the week progresses and no new full backups have been performed. To restore data in a full/differential backup scheme, you need to restore the most recent full backup and the most recent differential backup that occurred since the last full backup.

A full backup, sometimes referred to as an archive backup, backs up all files in a backup set.

An incremental backup backs up all files in a backup set that were created or changed since the last backup of any type. To restore data in a full/incremental backup scheme, you need to restore the most recent full backup and then restore in order all incremental backups that have occurred since the most recent backup.

Administrators should consider regularly backing up information on network computers to protect against data loss, which can be caused by misuse of equipment, hacker infiltration, or equipment failure.

 

Related Course
CISSP Certification Prep Course

CISSP Question of the Week Series

• CISSP Question of the Week: Pillar of Basel II
• CISSP Question of the Week: Implement Redundant Servers
• CISSP Question of the Week: Terrorist Attacks
• CISSP Question of the Week: Customer Credit Card Information
• CISSP Question of the Week: Complex Instruction Set Computers
• CISSP Question of the Week: Asymmetric Encryption
• CISSP Question of the Week: OSI Layer for Formatting Data
• CISSP Question of the Week: Secure Communications
• CISSP Question of the Week: Biometric System and Fingerprinting Technology
• CISSP Question of the Week: Security Management Life Cycle
• CISSP Question of the Week: Anomaly-based Monitoring
• CISSP Question of the Week: Forensic Investigation
• CISSP Question of the Week: File Backup

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