Virtual Server is a technology that allows multiple independent Web sites to be hosted on a single Web server. A virtual server is sometimes referred to as a Web site.
Internet Information Services (IIS) supports virtual servers in three ways:
The term “virtual server” is also used in Microsoft Cluster Server (MSCS), where it is a collection of services that appears to clients as a physical Microsoft Windows NT Server. The same terminology is also used in the Windows Clustering component of Microsoft Windows 2000 Server. A virtual server is usually a resource group that contains all the resources necessary for running an application, including the network name and IP address resources.