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  2. Computer network - Wikipedia

    en.wikipedia.org/wiki/Computer_network

    Fiber-optic cables are used to transmit light from one computer/network node to another. The following classes of wired technologies are used in computer networking. Coaxial cable is widely used for cable television systems, office buildings, and other work-sites for local area networks. Transmission speed ranges from 200 million bits per ...

  3. Network architecture - Wikipedia

    en.wikipedia.org/wiki/Network_architecture

    Network architecture. Network architecture is the design of a computer network. It is a framework for the specification of a network's physical components and their functional organization and configuration, its operational principles and procedures, as well as communication protocols used. In telecommunication, the specification of a network ...

  4. Systems Network Architecture - Wikipedia

    en.wikipedia.org/wiki/Systems_Network_Architecture

    Systems Network Architecture. Systems Network Architecture[ 1] ( SNA) is IBM 's proprietary networking architecture, created in 1974. [ 2] It is a complete protocol stack for interconnecting computers and their resources. SNA describes formats and protocols but, in itself, is not a piece of software. The implementation of SNA takes the form of ...

  5. Server (computing) - Wikipedia

    en.wikipedia.org/wiki/Server_(computing)

    A server is a computer that provides information to other computers called "clients" on computer network. [ 1] This architecture is called the client–server model. Servers can provide various functionalities, often called "services", such as sharing data or resources among multiple clients or performing computations for a client.

  6. Computer Systems Institute - Wikipedia

    en.wikipedia.org/wiki/Computer_Systems_Institute

    Website. csinow.edu. Computer Systems Institute (CSI) is a private for-profit school headquartered in Skokie, Illinois. It was founded in 1989 by Ella Zibitsker, its current chairman of the board. CSI has six campus locations in the Chicago and Boston metro areas.

  7. Metropolitan area network - Wikipedia

    en.wikipedia.org/wiki/Metropolitan_area_network

    A metropolitan area network ( MAN) is a computer network that interconnects users with computer resources in a geographic region of the size of a metropolitan area. The term MAN is applied to the interconnection of local area networks (LANs) in a city into a single larger network which may then also offer efficient connection to a wide area ...

  8. Firewall (computing) - Wikipedia

    en.wikipedia.org/wiki/Firewall_(computing)

    Firewall (computing) In computing, a firewall is a network security system that monitors and controls incoming and outgoing network traffic based on predetermined security rules. [ 1][ 2] A firewall typically establishes a barrier between a trusted network and an untrusted network, such as the Internet. [ 3]

  9. AOL Mail

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