Internet hosting services can run Web servers; see Internet hosting services.
Hosting services are limited at the Web:
Many large companies who have not provide internet service and also need a computer permanently connected to the web so they can send email, files, etc. to other sites. They may also use the computer as a website host so they can provide details of their goods and services to anyone interested. Additionally these people may decide to place online orders.
A web host can cover everywhere from one to a number of thousand computers that can run Web hosting software, such as Apache, OS X Server, or Windows Server. Most websites you see on the Web are accessed from a "shared host," which is a single computer that can host several hundred Web sites.
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