Server virtualization is the process of creating multiple server instances from one physical server. Each server instance represents an isolated virtual environment. Within each virtual environment, you can run a separate operating system.

Virtual machines (VM) are computing instances created by a program running on another machine, they don’t physically exist. The machine creating the VM is called the host machine and the VM is called a “guest.” You can have many guest VMs on one host machine. A virtual server is a server created by a program.

A virtual machine (VM) is a software computer used as emulation of an actual physical computer. A virtual server operates in a “multi-tenant” environment, meaning that multiple VMs run on the same physical hardware. In this case, the computing resources of a physical server are virtualized and shared among all VMs running on it.