When we start learning cybersecurity, one of the first things we do is install a virtual machine on our computer.
But what exactly are virtual machines, and how do they work? Let’s break it down.
What is Virtualization?
Before we dive into virtual machines, there’s something important we need to understand: virtualization technology.
Virtualization allows physical hardware resources to be transformed into virtual ones through software.
Thanks to this technology, you can run multiple operating systems on a single device.
For example, you could run a Linux-based OS on a Windows 10 machine at the same time.
How Does Virtualization Work?
Virtualization is made possible by a piece of software called a hypervisor.
The hypervisor abstracts the physical hardware and manages the distribution of resources between virtual machines.
Type 1 Hypervisor (Bare Metal) vs. Type 2 Hypervisor (Hosted)
A Type 1 hypervisor runs directly on the hardware.
Hardware → Hypervisor → Virtual MachinesA Type 2 hypervisor runs on top of an existing operating system.
Hardware → Host OS → Hypervisor → Virtual Machines
Benefits of Virtualization
- Resource Efficiency: Makes better use of hardware resources
- Cost Savings: Reduces the need for multiple physical servers
- Flexibility: Systems can be quickly deployed and easily moved
- Isolation: Problems in one system won’t affect others
- Reversibility: With snapshots, you can roll back to a previous state
What is a Virtual Machine?
A virtual machine (VM) is a software-based computer created through virtualization technology.
It runs its own operating system and behaves as if it has its own CPU, memory, and storage — but it doesn’t physically exist.
It’s a virtual version of a real computer, running inside your actual computer.
Stay secure! 🛡️