What is the name of the core OS fully dedicated to running virtual machines?

The core operating system dedicated to running virtual machines is known as VMkernel. This component is an integral part of VMware's ESXi hypervisor, which allows for the management and allocation of physical resources, such as CPU, memory, and storage, to virtual machines. VMkernel operates directly on the hardware and provides a lightweight and efficient environment tailored for virtualization tasks.

VMkernel is responsible for critical functions such as memory management, process scheduling, and input/output (I/O) operations, making it essential for the performance and stability of virtualized environments. The architecture of VMkernel is designed to optimize the running of multiple virtual machines simultaneously, enabling high availability and resource efficiency.

The other options refer to different aspects of virtualization and cloud management but do not represent the core operating system specifically intended for running virtual machines. For instance, while a hypervisor is a type of software that creates and runs virtual machines, VMkernel is specifically the low-level operating system that provides the underlying functionality for the hypervisor. Similarly, vSphere Server refers to a suite of products and services for virtualization management that utilizes the VMkernel but does not denote the core OS itself. Lastly, a Cloud Management System encompasses various tools and processes for managing cloud resources but does not relate directly to