In cloud services, which term describes a fully functional backup site ready to take over operations instantly?

A hot site describes a fully operational backup facility that is equipped with all the necessary hardware, software, and network infrastructure to take over business operations immediately in the event of a disaster. This readiness to switch to a backup system minimizes downtime, providing continuity of services and reducing the impact of potential disruptions.

In contrast, an active/active setup involves multiple locations that are all actively processing data and can handle loads simultaneously, which isn’t specifically a "backup" site. A warm site typically has some infrastructure in place but may require additional setup or data restoration to become fully operational, leading to potential delays. A cold site, on the other hand, is essentially a bare-bones facility that might house the space and essential infrastructure but lacks immediate readiness, as it would require significant time and resources to become operational. Thus, the hot site is the best answer when considering immediate operational capability.