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Full Duplex - Definition

Full Duplex refers to the transmission of data in two directions simultaneously. For example, a telephone is a full-duplex device because both parties can talk as well as listen at once. In contrast, a walkie-talkie is a half-duplex device because only one party can transmit at a time, where in this example, the other party would be receiving the transmission. Most modems have a switch that lets you choose between full-duplex and half-duplex modes. The choice depends on which communications program you are running.

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