GSX Server is a server virtualization program for Windows and Linux produced and distributed by VMware,/term>, a subsidiary of EMC Corporation and headquartered in Palo Alto, California. The program facilitates the remote management, provisioning and standardization of platform.
In server virtualization, an application program such as GSX Server, IBM VM/ESA or Microsoft VM divides a single physical server into multiple isolated virtual machines called guest OSes or simply guests. Each guest runs on a virtual imitation of the hardware, allowing it to function without modifications. A guest OS does not have to be the same as the host OS.