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What are simplex and duplex communications?

April 26, 2017communications Computer Computers DUPLEX internet networking simplex

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What are simplex and duplex communications?

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Simplex: One device at at time, using a single communications channel. Duplex: Two devices simultaneously, using separate communications channels. Half-Duplex: One device at a time, using separate communications channels. Note that the communications channels can be physical or logical.

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Duplex communication A duplex communication system is a system composed of two connected parties or devices that can communicate with one another in both directions Simplex communication Simplex communication refers to communication that occurs in one direction only. Two definitions have arisen over time: a common definition, which is used an ANSI standard and elsewhere, and an ITU-T definition. The ITU definition of simplex is termed “half duplex” in other contexts.