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Full duplex

Full duplex definition

A full duplex is a communication mode in which data can be transmitted simultaneously in both directions over a communication channel. In other words, it allows for two-way communication to occur at the same time, with data flowing in both directions independently.

In contrast to a half-duplex, where data can only be transmitted in one direction at a time (similar to a walkie-talkie), a full duplex enables concurrent communication, similar to a telephone conversation. This capability is particularly useful in situations where real-time, interactive communication is required.

Full duplex communication can be achieved using various technologies and protocols, like Ethernet, telephony systems, and wireless networks. It relies on separate channels or frequencies for transmitting and receiving data to prevent interference between the two streams. For example, in a full duplex Ethernet connection, separate wires or fiber strands are used for the transmit (Tx) and receive (Rx) paths.

See also: real-time communications

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Full duplex communication is used whenever real-time, two-way communication is necessary.

  1. 1.Traditional landline telephone systems use full duplex communication. When you make a phone call, you can speak and listen at the same time, allowing for smooth and uninterrupted conversation.
  2. 2.Internet and data networks. Full duplex is widely used in computer networks, like Ethernet, to enable simultaneous data transmission and reception, ensuring efficient and high-speed communication between devices.
  3. 3.Wireless communication. Many wireless communication technologies (Wi-Fi, 4G and 5G networks, Bluetooth) use full duplex communication. Simultaneous data transmission and reception allow for seamless voice calls, video streaming, and internet browsing.