7 terms
The 3-2-1 backup rule calls for three copies of data on two different media with one copy offsite, a baseline strategy for backup and recovery.
A differential backup copies all data changed since the last full backup, so a server restore needs only that full backup plus the newest differential.
Disaster recovery (DR) is the planned process of restoring servers, data and services after a major outage within defined RTO and RPO targets.
A full backup copies every selected file, database or volume in one complete, self-contained set that can be restored without any other backup in the chain.
An incremental backup copies only the data changed since the previous backup of any type, saving time and storage at the cost of longer restore chains.
A restoration test restores a backup to a separate environment and verifies the result, proving that server data can actually be recovered when needed.
A snapshot in server backup and recovery is a point-in-time image of a volume or file system that allows fast rollback but is not a full…