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Networking

A computer network is a group of computers that are interconnected by electronic circuits or wireless transmissions of various designs and technologies for the purpose of exchanging data or communicating information between them or their users. Networks may be classified according to a wide variety of characteristics. This article provides a general overview of types and categories and also presents the basic components of a network.
A computer network allows sharing of resources and information among devices connected to the network. The Advanced Research Projects Agency (ARPA) funded the design of the Advanced Research Projects Agency Network (ARPANET) for the United States Department of Defense. It was the first operational computer network in the world. Development of the network began in 1969, based on designs developed during the 1960s.

Purpose
	Facilitating communications. Using a network, people can communicate efficiently and easily via e-mail, instant messaging, chat rooms, telephony, video telephone calls, and videoconferencing.
	Sharing hardware. In a networked environment, each computer on a network can access and use hardware on the network. Suppose several personal computers on a network each require the use of a laser printer. If the personal computers and a laser are connected to a network, the personal computers users each can access the laser printer on the network, as they need it.
	Sharing files, data, and information. In a network environment, any authorized computer user can access data and information stored on other computer on the network. The capability of providing access to and storage of data and information on shared storage devices is an important feature of many networks.
	Sharing software. Users connected to a network can access application programs on the network.

Technology

	Dot Net and Sharepoint
	Version Control
	Defect Tracking System
	Build and Release Management
	Java
	Web 2.0
	Ajax
	Databases
	Networking

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Some Basic Types of Computer Networks Include:
	A local area network (often called a LAN) connects two or more computers in a house or an office.
	A corporate network enables communication among various offices of the same organization.
	An "internetwork", sometimes called a Wide Area Network (because of the wide distance between networks) connects two or more smaller networks together. The largest internetwork is called the Internet.

Out of these LAN and WAN are the two fundamental networks designated on the basis of their width.
Networks can also be divided based on their arrangement. These may be Peer to Peer Network, Server-based Network or Client-Server Network, Hybrid Network etc. Computers can be part of several different networks. Networks can also be parts of bigger networks. The local area network in a department store is usually connected to the corporate network of the parent company, and may have privileges with the corporate network of a bank.