What are Virtual Servers
Groups that contain an IP address resource and a network name resource (along with other resources) are published to clients on the network under a unique server name. Because these groups appear as individual servers to clients, they are called virtual servers. Users access applications or services on a virtual server the same way they access applications or services on a physical server. They do not need to know that they are connecting to a cluster and have no knowledge of which node they are connected to.