An administrator is creating a redundant environment for a current data center. A backup site must be available if the entire data center site should become unavailable. To reduce costs, this backup s

A hot site is fully operational with near-real-time data replication, ready for immediate failover, which is more expensive and exceeds the stated requirements.

A warm site provides a balance between cost and recovery time; it has essential hardware and connectivity in place, but may require some configuration, data restoration, and applications to be deployed before it can fully operate. This fits the requirement of not being "up and running at all times" but having "equipment and the ability to restore data."

A cold site provides only basic infrastructure like power and cooling, requiring significant time to acquire and install equipment and restore data, which is too slow given the requirement for equipment to be present.

An active failover site typically refers to a hot site configuration where both sites are actively processing traffic or one is ready for immediate failover, which implies higher costs and continuous operation.