Transmission Modes
Transmission Modes in Computer
Networks
Transmission
mode refers to the mechanism of transferring of data between two devices
connected over a network. It is also called Communication Mode.
These modes direct the direction of flow of information. There are three types
of transmission modes. They are:
1.
Simplex Mode
2.
Half duplex Mode
3.
Full duplex Mode
SIMPLEX Mode
In
this type of transmission mode, data can be sent only in one direction i.e.
communication is unidirectional. We cannot send a message back to the sender.
Unidirectional communication is done in Simplex Systems where we just need to
send a command/signal, and do not expect any response back.
Examples
of simplex Mode are loudspeakers, television broadcasting, television and
remote, keyboard and monitor etc.
HALF DUPLEX Mode
Half-duplex
data transmission means that data can be transmitted in both directions on a
signal carrier, but not at the same time.
For example, on a local area network using a technology
that has half-duplex transmission, one workstation can send data on the line
and then immediately receive data on the line from the same direction in which
data was just transmitted. Hence half-duplex transmission implies a
bidirectional line (one that can carry data in both directions) but data can be
sent in only one direction at a time.
Example
of half duplex is a walkie- talkie in which message is sent one at a time but
messages are sent in both the directions.
FULL DUPLEX Mode
In
full duplex system we can send data in both the directions as it is
bidirectional at the same time in other words, data can be sent in both
directions simultaneously.
Example
of Full Duplex is a Telephone Network in which there is communication between
two persons by a telephone line, using which both can talk and listen at the
same time.
In
full duplex system there can be two lines one for sending the data and the
other for receiving data.
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