Califmall, Earthlink, AOL, GeoCites, and many others host sites in this manner. This may also be a consideration for printing a web site address on a business card or stationery, etc. Dedicated servers are available Today, most hosting is done on fairly large computers that support multiple domain names. In most cases this works well because the cost is lower as dulication of software and equipment can be avoided. However, large sites that receive a lot of traffic may require dedicated servers in order to be highly effective.
Software options are available Sometimes client prefer to design and maintain their own sites.
WebWind productions can satisfy any client's needs easily and conveniently.