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A hypervisor, also known as a virtual machine monitor (VMM) or virtualizer, is a type of computer software, firmware or hardware that creates and runs virtual machines. A computer on which a hypervisor runs one or more virtual machines is called a host machine , and each virtual machine is called a guest machine .
Platform virtualization software, specifically emulators and hypervisors, are software packages that emulate the whole physical computer machine, often providing multiple virtual machines on one physical platform. The table below compares basic information about platform virtualization hypervisors.
Some bare-metal cloud servers may run a hypervisor or containers, e.g., to simplify maintenance or provide additional layers of isolation. [ 4 ] Note that the distinction between these services and the traditional dedicated server offerings is the user's ability to provision infrastructures composed out of multiple servers, a complex network ...
The words host and guest are used to distinguish the software that runs on the physical machine from the software that runs on the virtual machine. The software or firmware that creates a virtual machine on the host hardware is called a hypervisor or virtual machine monitor. [2] Hardware virtualization is not the same as hardware emulation ...
Some well-known client hypervisors are VMware Workstation, VirtualBox and VirtualPC. Client hypervisors are categorized in two types: Type 1 (Bare metal): this type of client hypervisor runs directly on the host machine's hardware and serves as the host operating system, providing hardware access to guests via its own drivers. Also, it create a ...
VMware ESXi (formerly ESX) is an enterprise-class, type-1 hypervisor developed by VMware, a subsidiary of Broadcom, for deploying and serving virtual computers.As a type-1 hypervisor, ESXi is not a software application that is installed on an operating system (OS); instead, it includes and integrates vital OS components, such as a kernel.
In computer science, bare machine (or bare metal computer) refers to a computer which has no operating system. [1] The software executed by a bare machine, commonly called a "bare metal program" or "bare metal application", [ 2 ] is designed to interact directly with hardware.
Virtualization emulates the hardware environment of its host architecture, allowing multiple OSes to run unmodified and in isolation. At its origins, the software that controlled virtualization was called a "control program", but the terms "hypervisor" or "virtual machine monitor" became preferred over time. [1]