Which type of backup allows restoring the system faster in the event of failure?

A full backup captures every file and folder on the system at a specific point in time. This means that when a restoration is necessary following a failure, all data is readily available in a single backup set. Consequently, the recovery process becomes significantly quicker, as there is no need to sift through multiple backup sets or pieces of data, which is often the case with incremental or differential backups.

In contrast, while incremental backups save space and time by only storing changes made since the last backup, they require the restoration of multiple backup sets to fully restore the system, thus prolonging the recovery time. Differential backups, on the other hand, capture data changed since the last full backup, but they still necessitate more time to restore than a complete single full backup as they accumulate more data over time. An online backup allows for continuous data backup but does not primarily focus on the speed of restoration as a full backup does.

Thus, a full backup stands out as the method that offers the fastest recovery process during system failures, making it the ideal choice for users prioritizing rapid restoration capabilities.