What are Virtual Servers

[Swati walia]

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.

[SwatiSood]

A virtual server is a server that uses a unique combination of IP address, port number and host name to identify it. ... For example, you might have one virtual server called hr.acme.com, and another called mis.acme.com, both of which reside on the same Web server instance, and listen for requests on the same port.

[lisajohn]

A virtual server re-creates the functionality of a dedicated physical server. It exists transparently to users as a partitioned space inside a physical server. Virtualizing servers makes it easy to reallocate resources and adapt to dynamic workloads.