<networking> Most computers on the Internet
have a single Internet address
; however, often via special kernel
patches, a given computer can be made to respond to several IP
addresses and provide different services (typically different Web
services) on each.
Each of these different IP addresess (which generally each have their own hostname
) act as if they were distinct hosts on distinct machines, even though they are actually all one host.
Hence, they are virtual
A common use is when an Internet Service Provider
"hosts" World-Wide Web
or other services for several of their customers on one computer but giving the appearence that they are separate servers.