Citrix Hypervisor, formerly known as XenServer, is a high-performance, enterprise-class hypervisor solution that provides advanced virtualization capabilities for data centers and cloud environments. As a product of Citrix Systems, it offers comprehensive support services, including technical support, product updates, and access to self-service resources such as documentation, knowledge base articles, and forums. Citrix Hypervisor integrates with Apache CloudStack, enabling administrators to take advantage of its robust features within CloudStack deployments, creating a flexible and powerful virtualization solution for managing diverse workloads.