Hypervisor is a software, firmware or hardware which helps to run virtual machine. It makes virtualization possible.
If you want to experience Linux, for an example, on your laptop without dual-boot you may use any hypervisors. I used Oracle VirtualBox Hypervisor for almost a year
now. Hypervisor allows you to run any type of virtual machine (Linux, Unix, Windows, macOS, Android, and whatever you like) without dual-boot your laptop.
We may use hypervisor to experience any machine like in computer science we need to have basics of Linux commands. People around the world use it to learn different machines
without any fear of going wrong if suppose you fall in hole you just need to reinstall that machine.
There are different type of hypervisors like there are two types:
i. Type I :- There is no software or any operating system in between.
Examples : 1. VMware ESXi
2. Apple Boot Camp
3. Microsoft Hyper-V
4. Kernel-Based Virtual Machine
Type 1 hypervisors are mainly found in enterprise environments.
ii. Type II :- This type of hypervisor runs inside of an operating system of a physical host machine.
Examples : 1. VMware player and workstation
2. VirtualBox
3. QEMU
4. Parallels Desktop(For MAC)
As a student/newbie we are going to use Type 2 hypervisor because we just need a software to work on virtual machine.
Some famous and most used hypervisor around the world are:
1. VirtualBox by Oracle:- VirtualBox Is a free and open-source hosted hypervisor for x86 virtualization developed by oracle
Comparison:-
Cost : Free
Performance: ⭐⭐⭐
Speed: ⭐⭐⭐⭐
Overall Rating : ⭐⭐⭐⭐(3.5)
2. VmWare Workstation : VMware Workstation is a hosted hypervisor that runs on x64 versions of Windows and Linux
operating systems; it enables users to set up virtual machines on a single physical machine and use
them simultaneously along with the host machine.
Comparison:-
Cost : Free but for personal use only.
Performance: ⭐⭐⭐⭐
Speed: ⭐⭐⭐⭐
Overall Rating : ⭐⭐⭐⭐(4.0)
3. HyperV by Microsoft :- Microsoft Hyper-V, codenamed Viridian, and briefly known before its release as Windows Server
Virtualization, is a native hypervisor; it can create virtual machines on x86-64 systems running Windows.
Comparison:-
Cost : Free but for windows user only.
Performance: ⭐⭐⭐
Speed: ⭐⭐⭐
Overall Rating : ⭐⭐⭐ (3.0)
Now let's have something from pros and cons.
Pros of Hypervisor
With a hypervisor, you can successfully run and monitor concurrent virtual machines on a host.
Without it, operating multiple applications on the same hardware often creates conflicts.
VMMs make co-existing on one system possible and consolidate workloads and multiple operating environments.
Hypervisor makes sure to individualize every virtual machine, so the problem of one does not affect the others.
Without accessing host resources, hypervisors achieve a better level of computing performance,
availability, and scalability.
VMM reduces time consumption in testing and run-time debugging.
It moreover, automates the management processes, resulting in low operational expenses.
Cons of Hypervisor (with solutions)
It becomes challenging to find reliable hypervisor services for yourself.
Solution : Switch to different hypervisor and find your taste.
Hypervisor lacks the capability of running VMs on domestic computers.
Solution : There are many non-hypervisor virtualization technologies for that.
Security may become an issue. While robust, hypervisors may become an easy cyberattack target.
Solution : Always have updated machine and check for settings regularly. You can furthermore ensure overall protection by limiting the host management access, encryption, UEFI secure boot, and a suitable network security tool.
Hypervisor can not have access to each component like Wi-Fi-modules, which can be a problem while using applications
like aircracks (Kali Linux).
Solution: You need to buy Wi-Fi adapter.
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