Which of the following backup method must be made regardless of whether Differential or Incremental methods are used?
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A. B. C. D.A.
A Full Backup must be made regardless of whether Differential or Incremental methods are used.
Source: KRUTZ, Ronald L.
& VINES, Russel.
D., The CISSP Prep Guide: Mastering the Ten Domains of Computer Security, 2001, John Wiley & Sons, Page 69
And: HARRIS, Shon, All-In-One CISSP Certification Exam Guide, McGraw-Hill/Osborne, 2002, chapter 9: Disaster Recovery and Business continuity (pages 617- 619).
The correct answer is A. Full Backup Method.
A backup is a copy of data that can be restored in case the original data is lost or damaged. The backup process is an important part of any organization's data protection strategy. There are different types of backup methods, including full backup, incremental backup, differential backup, and others.
A full backup is a complete copy of all data that needs to be backed up. It is the most comprehensive backup method, as it captures all data and information at a specific point in time. A full backup is typically the first backup made in a backup cycle, and it is recommended to perform a full backup periodically, such as daily, weekly, or monthly.
An incremental backup is a backup that only copies the data that has changed since the last backup. It backs up only the data that has been modified or created since the last full or incremental backup. Incremental backups are faster and require less storage space than full backups, but restoring data from an incremental backup may take longer, as it requires restoring the last full backup and all subsequent incremental backups.
A differential backup is similar to an incremental backup, but it copies all data that has changed since the last full backup, regardless of whether it has been backed up before. Differential backups are faster than full backups but slower than incremental backups. Restoring data from a differential backup may also take longer than restoring data from an incremental backup, as it requires restoring the last full backup and the last differential backup.
A supplemental backup is a backup made in addition to the regular backups, typically for important or critical data. It is not a standard backup method and is not required to be made regardless of whether differential or incremental methods are used.
A tape backup is a backup method that uses magnetic tape to store data. It is a physical storage medium that is less common nowadays, as many organizations use cloud storage or other digital storage methods.
In conclusion, the full backup method must be made regardless of whether differential or incremental methods are used because it captures all data and information at a specific point in time, and it is the foundation for all subsequent differential or incremental backups.