Which of the following BEST describes server virtualization?

This describes clustering or distributed computing, where a single logical service is spread across multiple physical machines for high availability or scalability.

This describes a basic client-server model or application server deployment, not specifically server virtualization.

This describes a typical distributed application architecture where multiple physical servers host various applications for users, but it doesn't specify the virtualization aspect of creating logical instances on physical hardware.

Server virtualization enables a hypervisor to create and run multiple independent virtual machines (logical servers), each with its own operating system and applications, all sharing the resources of a single underlying physical hardware server. This consolidates workloads and improves resource utilization.