DSAC-11 Annex C Practice Test

The key idea is that software that runs on each physical host to allocate resources to virtual machines is called a hypervisor. It sits between the hardware and the VMs and handles assigning CPU time, memory, I/O, and network access while keeping VMs isolated from one another. When talking about this role across an entire infrastructure with multiple hosts, you refer to the software collectively as hypervisors—the plural form signals the category across hardware. Using the singular would describe the virtualization layer on a single host rather than the whole system. Other terms like Virtualization Manager or VM Monitor aren’t the standard label for this broad, cross-host role.