Modes of data transmission?
Data can be transferred in 3 different modes, these 3 modes are
equally popular and used in common everyday situations.
•Simplex
If data can only be transferred in a single direction (one way)
it is known as simplex. Television transmission is an example of
Simplex transmission, here data can be transferred only to a
television but no data can be transferred in the opposite
direction.
•Duplex
When data maybe transferred in two directions simultaneously it
is known as Duplex, a simple telephone conversation would be an
example, while we usually don't talk simultaneously a telephone
provides that 'duplex' functionality.
•Half-Duplex
In this mode of transmission as well, data maybe transmitted in
both directions, however it cannot be done simultaneously. A Walkie
Talkie would be an example of this mode of transmission.
The different modes are implemented based on their requirements,
for example in Simplex transmission, two way transmission is not
required in television transmission thus Simplex is used.