High-Availability (HA)

• ensure an agreed level of operational performance, usually uptime
• about minimizing outages
• can be achieved with having standby servers that are automated to be used when issues on main servers appear
• not as good as FT

Fault-Tolerance (FT)

• enable a system to continue operating properly in the event of the failure of some of its components
• about operating through failure
• can be achieved with redundancy and ability to route around failures
• harder and more expensive than HA

Disaster Recovery

• enable the recovery of vital technology following a natural or human-induced disaster
• involves pre-planning and the DR Process
• taking regular offsite backups
• logins and keys and process should be saved