RS 232 communication is

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LPSC ISRO Technical Assistant Electronics 23 Feb 2020 Official Paper
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  1. Full duplex
  2. Half duplex
  3. Simplex
  4. Command response system

Answer (Detailed Solution Below)

Option 1 : Full duplex
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Detailed Solution

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Concept:

The data flow between the two devices can be in simplex, half-duplex, and full-duplex modes.

Simplex: In Simplex, communication is unidirectional. Only one of the devices sends the data and the other one only receives the data.

Example: A CPU sends data while a monitor only receives data.

Half-Duplex: In half-duplex both the stations can transmit as well as receive but not at the same time. When one device is sending others can only receive and vice-versa

Example: A walkie-talkie.

Full Duplex: In Full-duplex mode, both stations can transmit and receive at the same time.

Example: Mobile phones

Application:

  • RS-232 is a bi-directional (Full duplex) point to point communication link.
  • Two independent channels are established for two-way (Full-Duplex) communication.
  • This can be better understood with the following diagram:

        F2 S.B Madhu 16.06.20 D9

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