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Chapter 2 The Evolution of Virtualization In This Chapter ▶ Hypervisor 101 ▶ Today's challenges ▶ Tomorrow's data center T he whole idea behind a virtualized data center is to have a more efficient environment that's easier to manage and orchestrate. Hypervisors got the ball rolling by providing a way for applications to share compute resources transparently. Hypervisor 101: Sharing the Love A hypervisor is software that is installed on a host computer. That computer and the resources it controls then become part of a larger pool of resources that can be shared by virtual machines (VMs) on the network. The hypervisor controls how those resources are accessed by the VMs. There are multiple types of hypervisors: ✓ Bare metal hypervisors: These are commonly called Type 1 hypervisors, and run directly on a physical host server. Type 1 hypervisors directly control the server hardware and manage guest operating