Mastering Computer Studies: Unleash Your Potential in Computer Science and Hardware
Modes of data communicationThere are 3 modes of data communication:
(a). Simplex.
(b). Half duplex. (c). Full duplex. Simplex transmission:This is where communication is only in one direction (as in radio or television broadcast). The listener or viewer cannot communicate back through the radio or television receiver back to the broadcaster.Half duplex transmission:This refers to communication in both directions, but one direction at a time.A sender must first send the data before the recipient can reply, e.g., if two police officers are communicating using a ‘walkie talkie’ radio, one has to say “over” to mark the end of every statement in order for the other to respond. Full duplex transmission:This is where communication occurs in both directions simultaneously (as in computers that are sending & receiving data on a network).
Factors to consider when selecting a data transmission system
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