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server

This definition is part of our Essential Guide: Server form factors: A guide to rackmount, blade servers and more

A server is a computer program that provides services to other computer programs (and their users) in the same or other computers. The computer that a server program runs in is also frequently referred to as a server. That machine may be a dedicated server or used for other purposes as well.

In the client/server programming model, a server program awaits and fulfills requests from client programs, which may be running in the same or other computers. A given application in a computer may function as a client with requests for services from other programs and also as a server of requests from other programs.

Servers are often categorized in terms of their purpose. A Web server, for example, is a computer program that serves requested HTML pages or files. A Web client is the requesting program associated with the user. The Web browser in your computer is a client that requests HTML files from Web servers.

Here are a few types of servers, among a great number of other possibilities:

An application server is a program in a computer in a distributed network that provides the business logic for an application program. 

A proxy server is software that acts as an intermediary between an endpoint device, such as a computer, and another server from which a user or client is requesting a service. 

A mail server is an application that receives incoming e-mail from local users (people within the same domain) and remote senders and forwards outgoing e-mail for delivery. 

A virtual server is a program running on a shared server that is configured in such a way that it seems to each user that they have complete control of a server. 

A blade server is a server chassis housing multiple thin, modular electronic circuit boards, known as server blades. Each blade is a server in its own right, often dedicated to a single application.

A file server is a computer responsible for the central storage and management of data files so that other computers on the same network can access them.

A policy server is a security component of a policy-based network that provides authorization services and facilitates tracking and control of files. 

See an introduction to servers in a data center context:

See also: server virtualization, server sprawl

This was last updated in September 2016

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helps me about telling me basic of iis
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nice
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it helps me know about it clearly
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thank you............
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i think this website is shit
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ok but with cloud storage these days y would u need a server for a small business with around 5 to 10 employees ?
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:p
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What sort of server did Hillary Clinton have at her home in New York and what we're its functions?
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That should have been the mail server. Mail servers actually stores the mails of all the persons in a organization.
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this really helped thank you! ^^ *wink*
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this didnt help me at all
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Please explain why my computer keeps, coming on with comments saying: (server is not responding) This is a brand new computer. Everything is going down. Thank you for your time.
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I wouldn't call a sever a program.. more of a machine.
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Cheers mate your really cool
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hio
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The application server actually stores all the applications that are used by the employs of any organisation to use the application directly from the server rather downloading the application in the user system and install it to use them.
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