An administrator needs to back up changed files only and has time constraints on the back up window.
Which of the following is the BEST choice for a backup strategy?
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A. B. C. D.A.
The BEST choice for a backup strategy, given the time constraints and the need to back up changed files only, would be the Incremental backup.
Explanation:
A. Differential backup: A differential backup will back up all the files that have changed since the last full backup. While this is faster than a full backup, it may take longer than necessary since it backs up all files that have changed since the last full backup, not just the ones that have changed since the last backup.
B. Snapshot backup: A snapshot backup is a point-in-time copy of a system or data volume. It is commonly used in virtual environments to create a point-in-time copy of a virtual machine. While it provides a quick backup, it does not specifically address the need to back up changed files only.
C. Full backup: A full backup copies all the data on a system or volume. While this provides a complete backup, it is also the slowest backup option, and it does not address the need to back up only changed files.
D. Incremental backup: An incremental backup backs up only the files that have changed since the last backup. This provides a faster backup than a full backup, and it specifically addresses the need to back up changed files only. However, restoring files from an incremental backup can be more time-consuming since it requires restoring the last full backup and all incremental backups since then.
Given the time constraints and the need to back up changed files only, the BEST choice for a backup strategy is the Incremental backup. It provides a faster backup than a full backup and specifically addresses the need to back up only changed files.