Virtualization Concepts - CompTIA A+ 220-1201 - 4.1

With virtualization, you can have one physical device and run multiple operating systems on that same computer. For example, you might have a computer like I do that runs Mac OS and you can run Windows 11 and Linux all at the same time on that same system. This means that you have a separate operating

system, a separate CPU, dedicated memory, and a separate network connection for each of these virtualized operating systems. If all of these different operating systems are virtualized on your desktop, then we refer to this as a hostbased virtualization. This means you're running something like Mac OS as the primary operating system and then virtualizing other operating systems on

top of that. In an enterprise environment, we tend to use a single computer that has multiple operating systems running on it in a virtualized form. There is no desktop to choose from. Instead, you have a single device that has multiple VMs running on that single computer. And although virtualization has become very popular

on our computers and our servers, this is a technology that we've been running since 1967 when it was first introduced on IBM mainframes. We're using that same concept that we used back then to virtualize our modern operating systems on modern hardware. There are a lot of things you can do with a virtualized operating system or

what we commonly refer to as a virtual machine or VM. For example, if you're building your own applications, you might want to create a virtual machine that handles sandboxing. Sandboxing is an isolated environment that you can use during the development process to try out different aspects of code or to run things in a different OS to see what the