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hello everyone my name is vijay kumar Devireddy and i am glad to have you back on my episode 36 today we are discussing about When using virtualization, each emulated server runs its own operating system inside of a virtual machine, but the virtual machines are run on top of what's known as a hypervisor.A hypervisor may adjust the distribution of the physical resources of the server to the virtual machines.This includes the processor, the memory and the hard disk space.Hypervisors come in two distinct flavors,Type 1 and Type 2. A Type 1 hypervisor is known as bare metal, or native,since it runs directly on the host hardware and functions as a type of operating system.Microsoft's Hyper-V, Citrix's XenServer and VMWare's ESXi,and vSphere are all considered Type 1 hypervisors.A Type 2 hypervisor runs from within a normal operating system,something like Windows, Mac or Linux. For example, in the next lesson I'm going to demonstrate how we can install Windows 10 as an emulated desktop computer inside of a virtual machine that's being run by the software virtual box on my personal computer.Now, my personal computer is a Mac OS X desktop.But we're still going to be able to run windows inside of it.That's the power of using something like virtual box,because virtual box is an example of a Type 2 hypervisor.Another good Type 2 hypervisor is known as VMware.A Type 1, or a bare metal, hypervisor is faster and more efficient than a Type 2, or hosted, hypervisor.This is because a bare metal hypervisor doesn't have to waste any of the physical computer's resources by running a full desktop operating system,like Windows or Mac, first.Instead, a Type 1 hypervisor acts as a stripped-down, specialized operating system to provide the physical resources to the virtual machines that it hosts.Now, I know I said there's only two types of hypervisors.But there is a third type of virtualization that's becoming popular in our networks today.This is called Application Container-Based Virtualization.With this type of virtualization,the operating system kernel is shared across multiple virtual machines,but the user space for each of these virtual machines is uniquely created and managed.Often called Application Containerization, this allows an organization to deploy and run distributed applications without launching a resource-heavy, full virtual machine with a full operating system.This makes Application Containerization much more efficient than either a Type 1 or a Type 2 hypervisor,if it can meet the needs of your business and your organization.Container Virtualization is commonly used with Linux servers, and some examples of Container-Based Virtualization software include things like Docker,Parallels Virtuozzo,and the OpenVZ project.