Which of the following non-production sites is an operational mirror of the primary data center and is ready for use if the primary data center experiences an outage?

Warm sites are partially equipped and may have some data replication, but they are not fully operational at all times. In the event of an outage, a warm site requires additional time to become operational as it may need to be configured and updated with the latest data, leading to longer recovery times compared to hot sites.

Cold sites are essentially backup locations that have minimal equipment and do not maintain real-time data replication. They require significant time and effort to set up and become operational after an outage, making them unsuitable for immediate recovery needs.

Frozen sites are not a standard term in disaster recovery and typically refer to environments that are not actively maintained or updated. Such sites would be ineffective in providing operational continuity during an outage of the primary data center, as they do not support any real-time data access or replication.