Which of the following statements about OS virtualization is true?

The statement that OS virtualization allows multiple operating system images to run simultaneously is true because virtualization technology creates an abstraction layer over the physical hardware, enabling multiple virtual machines (VMs) to operate concurrently on the same physical host. Each VM can run its own operating system, independent of others, which optimizes resource usage and enhances flexibility for developers and system administrators.

This capability is essential in various scenarios, such as software testing, development environments, and server consolidation, where different applications may require different OS environments. By running multiple OS instances, organizations can maximize hardware utilization and improve operational efficiency.

In contrast to this option, the other statements are not aligned with the fundamental principles of OS virtualization. For example, stating that only one operating system can run at a time is inaccurate, as the core advantage of virtualization is its ability to support multiple concurrent operating systems. Likewise, the notion that OS virtualization eliminates the need for an OS is misleading; while it creates virtual machines, an operating system is still crucial for managing the VM environment. Finally, the applicability of virtualization to network resources is significant; it can enhance resource management and scalability in networking as well.