Which three commercial products enable server virtualization?

Which three commercial products enable server virtualization?

• A. VirtualBox, KVM, Proxmox
• B. VMware, Citrix XenServer, Microsoft Hyper-V
• C. VMware, VirtualBox, KVM
• D. Citrix XenServer, VirtualBox, Proxmox

Answer: (B)

Hypervisor-based server virtualization relies on vendor-provided hypervisors that partition physical hardware into multiple virtual machines. The three commercial options commonly used for this are VMware, Citrix XenServer, and Microsoft Hyper-V. VMware’s ESXi (part of the vSphere suite) is a leading commercial hypervisor with a full management stack. Citrix XenServer is another commercial virtualization platform offering Xen-based virtualization with enterprise tools. Microsoft Hyper-V is a hypervisor included with Windows Server licenses, providing strong integration with Windows environments. The other choices mix in free or open-source options—VirtualBox and KVM are open-source, while Proxmox is open-source with paid support—not standalone commercial products.

Hypervisor-based server virtualization relies on vendor-provided hypervisors that partition physical hardware into multiple virtual machines. The three commercial options commonly used for this are VMware, Citrix XenServer, and Microsoft Hyper-V. VMware’s ESXi (part of the vSphere suite) is a leading commercial hypervisor with a full management stack. Citrix XenServer is another commercial virtualization platform offering Xen-based virtualization with enterprise tools. Microsoft Hyper-V is a hypervisor included with Windows Server licenses, providing strong integration with Windows environments. The other choices mix in free or open-source options—VirtualBox and KVM are open-source, while Proxmox is open-source with paid support—not standalone commercial products.