A server is
|“||[a] computer or device on a network that manages network resources. Examples include file servers (to store files), print servers (to manage one or more printers), network servers (to manage network traffic), and database servers (to process database queries).||”|
|“||[a] computer program that provides services to other computer programs in the same or another computer. A computer running a server program is frequently referred to as a server, though it may also be running other client (and server) programs.||”|
Examples of servers include:
Almost the entire structure of the Internet is based upon a client-server model. Millions of servers are connected to the Internet and run continuously throughout the world. Among the many services provided by Internet servers are: the Web; the Domain Name System; electronic mail; file transfers; instant messaging; streaming audio and streaming video, online gaming, and countless others. Virtually every action taken by an ordinary Internet user requires one or more interactions with one or more servers.
- NIST Special Publication 800-47, at D-2.
- Practices for Securing Critical Information Assets, Glossary, at 58.
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