A technician needs to install an operating system patch on a virtual server. Which of the following backup types should the technician perform prior to the patch installation that will allow the…

Snapshots on virtual machines are created almost instantaneously by preserving the current disk state as a read-only reference point. Reverting a snapshot requires only seconds to minutes, making it far faster to restore than any tape or file-based backup method. This makes snapshots the ideal pre-patching safeguard in virtualized environments.

Incremental backup only saves changed blocks since the last backup, so restoration requires applying the last full backup followed by every incremental set, which is significantly slower than a snapshot rollback.

Differential backup captures all changes since the last full backup, so restoration still requires two backup sets and more processing time than a snapshot revert.

A full backup is the most complete but also the slowest to both create and restore, making it the least efficient choice when speed of recovery is the primary requirement.