Which term describes a software layer that enables running multiple virtual machines on a single physical host?

• A. Virtual Appliance
• B. Virtual Hypervisor
• C. URL
• D. Two-Factor Authentication

Answer: (B)

The main idea is virtualization with a hypervisor. A hypervisor is the software layer that sits between the physical hardware and the virtual machines, managing and abstracting the hardware resources. It allocates CPU, memory, storage, and network access to each VM while enforcing isolation so the machines don’t interfere with one another. This capability to host multiple independent VMs on one physical host is why the hypervisor is the correct term. It comes in two primary forms: bare-metal (running directly on hardware) and hosted (running atop an existing operating system). This differs from a virtual appliance, which is simply a packaged VM image ready to run on a hypervisor; a URL, which is just a web address; and two-factor authentication, which is a security mechanism.