1. Non-Persistence
   1. Systems are designed with the expectation that components will fail.
   2. A resilient or fault-tolerant system design is built with redundant components.
2. Revert to Known State
   1. OS features that revert a system to a previous configuration.
   2. If a system is compromised or corrupted, it may be possible to rollback that server to the last known good configuration:
      1. Rollback
         1. A term used to describe the process of returning a computer back to a state when it was working properly.
      2. Snapshots
         1. Common in virtualized/cloud environments
         2. The organization automatically takes images of the storage associated with a server at specified time intervals. If the server or drive fails, the snapshot may be used to rebuild the server.
3. Live Boot
   1. A complete bootable computer installation including operating system which runs directly from a CD-ROM or similar storage device into a computer's memory, rather than loading from a hard disk drive.