VMWare vSphere Standard

VMware virtualizes physical computers using its core hypervisor product. A hypervisor is a thin layer of software that interacts with the underlying resources of a physical computer (called the host) and allocates those resources to other operating systems (known as guests). The guest OS requests resources from the hypervisor.

The hypervisor separates each guest OS so each can run without interference from the others. Should one guest OS suffer an application crash, become unstable, or become infected with malware, it won't affect the performance or operation of other operating systems running on the host.