A hypervisor is a piece of computer software, firmware or hardware that
It's also known as:
The hypervisors run on physical computers, referred to as the host machine whereas VM running on a hypervisor is often called a guest machine
They use a runtime to run the container
A hosted virtualization hypervisor runs on the operating system of the host machine.
A bare-metal hypervisor runs from the host machine’s hardware. The hypervisor is the operating system of the host machine’s server.