Computer Science-Virtual Machines

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Description and Tags

VMs, Host OS, Guest OS, Hypervisor, emulation

A-Level Computer Science

VM

Virtual

Machine

Host

Guest

OS

Hypervisor

emulate

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4 Terms

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Virtual Machine

An emulation of an existing computer system, and OS in an OS. Nothing malicious can escape it.

2
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Host OS

Controls physical hardware, oversees virtual hardware through the guest OS.

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Guest OS

An OS running on a virtual machine. Has no ‘awareness’ that it is hosted, thinks it is an actual OS. Does not have same performance as real machine, complex, can be expensive.

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Hypervisor

Handles the mapping of virtual hardware to physical hardware.