A hypervisor is a virtualization platform that allows multiple operating systems to run simultaneously on a single hardware system. Each operating system runs in its own virtual machine (VM), which is isolated from the other VMs and the underlying hardware. Hypervisors can be either Type 1 or Type 2.
* Type 1 hypervisors, also known as bare-metal hypervisors, run directly on the hardware without the need for a host operating system. This type of hypervisor provides the highest level of performance and isolation, but it is also more complex to manage.
* Type 2 hypervisors, also known as hosted hypervisors, run on top of a host operating system. This type of hypervisor is easier to manage, but it does not provide the same level of performance or isolation as a Type 1 hypervisor.
Hypervisors are used in a variety of environments, including:
* Server virtualization: Hypervisors can be used to consolidate multiple physical servers into a single virtualized environment. This can reduce hardware costs, improve resource utilization, and simplify management.
* Desktop virtualization: Hypervisors can be used to deliver virtual desktops to end users. This can provide increased flexibility and security, and can reduce the need for physical PCs.
* Application virtualization: Hypervisors can be used to package and deploy applications as virtual appliances. This can make it easier to deploy and manage applications, and can reduce the need for physical servers.
Hypervisors are a key component of modern computing environments. They provide a way to improve efficiency, flexibility, and security.