NETWORK ~ Transmission modes
The data transmission can be in one direction or can be bidirectional. The transmission can be classified into 3 modes:
>Simplex
>Half Duplex
>Full Duplex
Simplex:
The communication can only go one way and it is not possible for the recipient to send data back. An example of simplex transmission would be data sent to an electronic bulletin board such as those found in train stations and airports.
Half Duplex:
Data can travel in both directions but not at the same time. Each end of the communication link plays the role of sender and receiver, e.g. two-way communication between computers and other computers that may be connected to a hub. Controls will be put in place to ensure that devices do not send at the same time. A human example of this type of communication is the use of walkie-talkies. Each person communicating must indicate when they have finished speaking.
Full Duplex:
Data can travel simultaneously in both directions, for example: two or more computers connected to a network device, such as a switch providing the full duplex option.
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