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In peer-to-peer networking, a supernode works as one of that network's relayers and proxy servers, handling data flow and connections for other users. This usually requires a fairly fast Internet connection with a lot of bandwidth and a modest amount of CPU time, as a lot of data will invariably pass through the supernode and needs to be processed. Some peer-to-peer designs allow for the user to choose whether they ever want to be treated as supernodes; others do not. Skype is one of the latter, an issue that has caused controversy. A "supernode" is assumed sometimes in circuit theory to solve a circuit, whereby a voltage source on a wire is viewed as a point source voltage in relation to other point voltages located at various nodes in the circuit, relative to a ground node assigned a zero charge. A supernode can also refer to Nodal analysis which is a circuit analysis technique used in Electrical Engineering.
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