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network,in computing, two or more computers connected for the purpose of routing, managing, and storing rapidly changing data. A local area networklocal area network
(LAN), a computer network dedicated to sharing data among several single-user workstations or personal computers, each of which is called a node. A LAN can have from two to several hundred such nodes, each separated by distances of several feet to as much as a
..... Click the link for more information. (LAN), which is restricted by distances of up to one mile, and a metropolitan area network (MAN), which is restricted to distances of up to 60 miles, connect personal computers and workstations (each called a node) over dedicated, private communications links. A wide area network (WAN) connects large numbers of nodes over long-distance communications links, such as common carrier telephone lines, over distances ranging from that between major metropolitan centers to that between continents. An internet is a connection between networks. The InternetInternet, the,
international computer network linking together thousands of individual networks at military and government agencies, educational institutions, nonprofit organizations, industrial and financial corporations of all sizes, and commercial enterprises (called gateways
..... Click the link for more information. is a WAN that connects thousands of disparate networks in the U.S., Canada, Europe, Asia, and elsewhere, providing global communication between nodes on government, educational, and industrial networks. Networks allow for resource sharing (e.g., multiple computers sharing one printer), data sharing, and communication or data exchange (e.g., electronic mailelectronic mail
the electronic transmission of messages, letters, and documents. In its broadest sense electronic mail includes point-to-point services such as telegraph and facsimile (fax) systems.
..... Click the link for more information. ).
See W. Stallings, ed., Advances in Local and Metropolitan Area Networks (1994); F. Halsall, Data Communications, Computer Networks, and Open Systems (4th ed. 1996); R. Cahn, Wide Area Network Design: Concepts and Tools for Optimization (1998); T. Parnell and C. Null, Network Administrator's Reference (1999).
networkA group of computer systems situated at different locations and interconnected in such a way that they can exchange information by following agreed procedures. The information is transmitted as an encoded signal at high speed over communication lines. See also computing.
The OSI seven layer model attempts to provide a way of partitioning any computer network into independent modules from the lowest (physical) layer to the highest (application) layer. Many different specifications exist at each of these layers.
Networks are often also classified according to their geographical extent: local area network (LAN), metropolitan area network (MAN), wide area network (WAN) and also according to the protocols used.
See BITNET, Ethernet, Internet, Novell, PSTN, network, the.
[Tanenbaum, A., "Computer Networks; 2nd ed.", Prentice Hall, Englewood Cliffs, NJ, 1989.]
network(1) Any arrangement of elements that are interconnected. See network database.
(2) A system that transmits data between users, which includes the user devices (phones, computers, etc.) and the network equipment (servers, switches, routers, cables, etc.). In wireless systems, antennas replace the cables.
LANs and WANs
Local area networks (LANs) are internal to a home, building or complex, and almost all use the IEEE Ethernet standard. The wireless counterpart is commonly known as "Wi-Fi." Wide area networks (WANs) span large distances, such as a state or nation. See LAN, WAN, Ethernet, Wi-Fi, client, server, switch, router, enterprise networking and communications.