Cell phone communication is a ___.

Question

Question

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RRB ALP CBT 2 Electronic Mechanic Previous Paper: Held on 23 Jan 2019 Shift 1

Answer 1

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

Full Duplex:

Simplex:

In Simplex, communication is unidirectional. Only one of the devices sends the data and the other one only receives the data.
The channel capacity is used by only one device all the time.
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
The channel capacity is shared by both the devices but at a time only once the device uses the full capacity.
Example: A walkie-talkie

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