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A Virtual Machine (VM) is a software-based emulation of a computer system that provides the functionality of a physical computer. Its purpose is to execute programs and applications as if they were running on an actual, physical machine. Here’s a detailed breakdown to answer various aspects users might inquire about:
### How does a VM work?
A VM uses software called a hypervisor to emulate hardware resources from the host system to create a virtual environment (the VM) that acts like a separate computer. This hypervisor can run multiple VMs simultaneously, each with its dedicated virtual hardware, including CPU, memory, hard drives, network interfaces, and other devices.
### Types of Virtual Machines:
1. System VMs: These provide a substitute for a real machine. They emulate complete computer systems, allowing an entire operating system (OS) to run.
2. Process VMs: These are designed to execute a single program or process and ensure its execution in a platform-independent environment.
### Benefits of Using VMs:
– Isolation and Security: VMs are isolated from the host system, making it easier to contain viruses or malware and prevent them from affecting the host system.
– Testing and Development: Developers use VMs to build and test applications in different environments without the need for multiple physical machines.
– Server Consolidation: Businesses utilize virtualization to consolidate multiple server roles onto fewer physical machines, saving on hardware costs and energy consumption.
– Legacy Application Support: VMs can support older