Host-based virtualization, also known as type-2 virtualization or hosted virtualization, is a type of virtualization where the virtualization software, also called the hypervisor, runs as an application on a host operating system (OS). In other words, the hypervisor is installed on top of the host OS, and the guest operating systems run as applications or processes within the hypervisor.
Host-based virtualization is often used for desktop virtualization, where multiple virtual machines (VMs) can be run on a single desktop or laptop computer. This allows users to run multiple operating systems and applications on the same hardware, without the need for additional physical machines.
One of the main advantages of host-based virtualization is that it is easy to install and use. Since the hypervisor runs as an application on the host OS, there is no need to install a separate OS or partition the hard drive. This makes it a good choice for developers and testers who need to quickly set up and test different software configurations.
However, host-based virtualization can also have some drawbacks. It may have higher overhead compared to other virtualization technologies, as the hypervisor must compete with the host OS for system resources. It may also have lower performance compared to other virtualization technologies, as the hypervisor has to communicate with the host OS to access hardware resources.
In summary, host-based virtualization is a type of virtualization where the hypervisor runs as an application on a host operating system. It is easy to install and use, but may have higher overhead and lower performance compared to other virtualization technologies.
