Encapsulation is the property of virtualization that allows entire virtual machines to be saved as a file that can be moved or copied like any other file.
A virtual machine is a tightly isolated software container that runs operating systems and applications the same as a physical computer. Although there is no requirement for hardware for a virtual machine to operate, it still has a CPU, RAM, hard disk, and network interface card just like a physical computer. These features make virtual machines incredibly easy to manage and portable, referring to as the encapsulation property of virtual machines.
The encapsulation allows one to move and copy a virtual machine from one device to another just like any other software file or program, as well as permits to save it on any storage medium.
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