The technology that allows multiple physical servers to operate as a single resource is known as virtualization. Virtualization creates virtual instances of servers, enabling efficient use of hardware resources while isolating different environments for testing or deployment. This technology enhances resource allocation, reduces costs, and improves scalability within data centers. It also facilitates disaster recovery by simplifying backup and migration processes. Overall, virtualization streamlines IT operations and maximizes hardware utilization, benefiting organizations striving for operational efficiency.