Which virtualization type replaces the OS on the physical server?

Which virtualization type replaces the OS on the physical server?

• A. Emulation
• B. Type I (Bare Metal)
• C. Type II (Hosted)
• D. Container-Based Virtualization

Answer: (B)

The main idea is a virtualization layer that sits directly on the hardware, without a separate operating system beneath it. That’s what a bare-metal hypervisor does. Installed straight onto the server’s hardware, it manages and runs virtual machines without an intervening host OS. This direct access to hardware typically yields better performance and simpler resource management because there’s one fewer software layer between the VMs and the physical hardware. In contrast, a hosted virtualization setup puts a virtualization program on top of an existing host operating system. Here, the physical server runs an OS, and the virtualization software is another layer above it, with the guest VMs managed through that host OS. Containers don’t replace the host OS either—they share the same kernel as the host, isolating applications at the process level rather than creating separate full operating-system instances. So, the option that replaces the OS on the physical server is the bare-metal (Type I) approach.

The main idea is a virtualization layer that sits directly on the hardware, without a separate operating system beneath it. That’s what a bare-metal hypervisor does. Installed straight onto the server’s hardware, it manages and runs virtual machines without an intervening host OS. This direct access to hardware typically yields better performance and simpler resource management because there’s one fewer software layer between the VMs and the physical hardware.

In contrast, a hosted virtualization setup puts a virtualization program on top of an existing host operating system. Here, the physical server runs an OS, and the virtualization software is another layer above it, with the guest VMs managed through that host OS. Containers don’t replace the host OS either—they share the same kernel as the host, isolating applications at the process level rather than creating separate full operating-system instances.

So, the option that replaces the OS on the physical server is the bare-metal (Type I) approach.