4 Computer Networking - Virtualization

Virtualization

The basic idea behind virtualization is to use software to simulate the existence of hardware. Each of the simulated computer is called a virtual  machine VM. The operating system has no idea that it is running on a virtual machine than an actual machine.

Terms

Host/Bare metal - Actual physical machine on which one or more virtual machines run

Guest - Another term for a virtual machine running on a host

Guest operating system - An operating system that runs within a virtual machine.

Hypervisor - The virtualization operating system that creates and runs virtual machines. 2 types of hypervisors. Type 1 - runs on bare metal. Type 2 - runs within an OS which itself runs on bare metal.

Simulated computers always slower than actual computers.

Ctrl+Alt+End used by VM to send Ctrl+Alt+Delete to host OS.