Which of the following best describes server virtualization?

• A. Running multiple virtual servers on a single physical host
• B. Duplicating a server across data centers
• C. Creating a single virtual server per physical server
• D. Eliminating hardware entirely

Answer: (A)

Server virtualization is about running multiple virtual servers on a single physical host. A hypervisor sits between the hardware and the virtual machines, allocating CPU, memory, storage, and networking so each virtual machine has its own isolated environment. This lets you consolidate workloads, improving hardware utilization and simplifying management, since you can deploy, move, or snapshot VMs without touching the underlying physical server. The other ideas aren’t what virtualization does: duplicating a server across data centers describes replication for resilience, which is a different technique; creating only one virtual server per physical server would waste the consolidation benefit; and eliminating hardware entirely isn’t virtualization—it still relies on physical resources somewhere in the data center or cloud.