Virtualization: Virtual Machines
A virtual machine is flexible, as its physical form is a set of files, configuration file, and virtual disk files.
Virtualization: Cloud
Virtualization of IT resources makes cloud computing, as we know it, possible; it includes server virtualization, storage virtualization, and network virtualization.
Virtualization
Virtualization is the abstraction of computing resources from the physical hardware, making it possible to run several operating systems on one computer.