Virtualization 101 : Type 1 and type 2 hypervisors
Type 2 hypervisors run on an existing - host - operating system
The - guest - operating systems running in the virtual machines have access the hardware through the hypervisor.
Below is a simple diagram of type 2 hypervisors:
- VMWare Workstation
- Oracle VirtualBox
Type 1 hypervisor accesses the hardware of the host machine directly.
Below is a simple diagram of type 1 hypervisors:
- VMWare ESX/ESXi
- Microsoft Hyper-V
- Linux KVM.
Hypervisors need CPU support to be activated in the BIOS - Intel-VT or AMD-V - depending on the CPU.
KVM and Qemu could also be used as type 2 hypervisor or from within Linux as a Type 1 hypervisor.