🛡️ Free practice test question from: Hypervisor (Security+)

The correct answer is A) A software layer that allows multiple operating systems to run concurrently on a single physical machine.  

A hypervisor, also known as a virtual machine monitor (VMM), is precisely that: software that creates and manages virtual machines (VMs). It sits between the hardware and the operating systems, allowing multiple operating systems to share the underlying physical resources.  

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B) describes a hardware accelerator (like a GPU with virtualization capabilities), not the hypervisor itself.

C) describes a management tool or platform built on top of virtualization, not the core hypervisor.

D describes a security tool, which might be used in conjunction with virtualization but isn't the definition of a hypervisor.