Answer :
Final answer:
A hypervisor is installed on a server to enable the creation and management of virtual machines, allowing multiple operating systems to run concurrently on the same physical hardware.
Explanation:
To allow for virtual machines (VMs) to be installed on a server, a piece of software known as a hypervisor is installed. A hypervisor creates a virtualization layer between the physical hardware of a server and the virtual environments that run the different operating systems. This allows for effective resource management and the ability to run multiple operating systems concurrently on the same physical server. The result is that multiple VMs can be consolidated onto fewer physical machines, reducing the need for excess hardware and improving efficiency.