What is a primary benefit of using a hypervisor?

Using a hypervisor offers significant advantages, and one of the primary benefits is the ability to allow for resource sharing across virtual machines (VMs). This means that multiple operating systems can run simultaneously on the same physical hardware, effectively utilizing the available resources such as CPU, memory, and storage.

By enabling multiple VMs to coexist on a single physical server, a hypervisor optimizes resource usage. It allows systems to dynamically allocate resources based on current needs, leading to more efficient performance and reduced waste of hardware capabilities. This resource sharing also facilitates easier management and scalability because administrators can easily adjust the allocation of resources among different VMs as workloads change.

In contrast, the other options do not accurately reflect the benefits of using a hypervisor. For example, increasing hardware costs or reducing server performance would not be desirable outcomes in a virtualized environment. While security can be improved through isolation in some contexts, it is not the primary benefit associated with hypervisor technology.