How does virtualization software work?

Question

I wonder how virtualization software such as VirtualBox or VMWare Workstation works? How can they create a virtual environment that is taken as a separate computer by operating

Answer 1

In the most basic sense, virtualization software puts a computer within another computer... kind of. (Here's a link that's very, very basic: http://blog.capterra.com/virtualization-software)

In a more complex sense, virtualization software (also called a hypervisor) abstracts the characteristics of a server. This allows several OSs to run on a single physical server.