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Switch (Elec/Tele Comm/Net)
Definition: in electronics, a device for interrupting or rerouting the flow of electric current. in telecommunications and networking, a device for establishing connections between one location and another, doing the work of a telephone operator. For instance, on a computer network, a switch is a device that temporarily creates high-speed paths between different segments as they are needed. It works like a hub but does not add congestion to cables on which the traffic is not actually needed.
Source: Downing, Douglas, et al. Dictionary of Computer and Internet Terms. 10th ed. New York, 2009. Print.