Virtual Machine (VM)
A Virtual Machine (VM) is a software-based emulation of a physical computer that runs an operating system and applications just like a real computer. It operates on a physical host machine using a hypervisor, which allocates the host’s hardware resources—such as CPU, memory, and storage—to the virtual machine.
VMs are widely used for software testing, server consolidation, cloud computing, and running multiple operating systems on a single physical machine. They allow users to isolate applications, enhance security, and maximize hardware efficiency without the need for additional physical computers.
Types of Virtual Machines include:
System VMs: Emulate entire physical computers and can run multiple OS instances simultaneously.
Process VMs: Run individual applications and provide a platform-independent execution environment, like the Java Virtual Machine (JVM).
Key benefits of using virtual machines include:
Cost Efficiency: Reduce the need for multiple physical machines.
Flexibility: Run different operating systems and applications on a single device.
Isolation: Prevents software errors or crashes in one VM from affecting others.
Scalability: Quickly create, clone, or migrate VMs for cloud or enterprise environments.
Virtual machines are fundamental in modern IT infrastructure, cloud services, and software development, providing a secure, versatile, and efficient computing environment.