A virtual machine (VM) is a software-based emulation of a physical computer that runs an operating system and applications. It allows users to run multiple operating systems on a single physical machine, making it a cost-effective and efficient way to deploy and manage multiple environments.
VMs are typically created using a hypervisor, which is a type of software that allows multiple VMs to run on a single physical machine. Each VM is isolated from the others, meaning that any changes or issues in one VM do not affect the others. This isolation also provides security benefits, as it helps prevent malware or other attacks from spreading between VMs.
VMs are commonly used for a variety of purposes, including testing software, running legacy applications, and consolidating servers in data centers. They can also be used for disaster recovery and backup purposes, as VMs can be easily replicated and moved between physical machines.
Overall, virtual machines provide flexibility, scalability, and cost savings for organizations looking to optimize their IT infrastructure.