Transmission Modes in Computer Networks
Transmission modes in computer networks are used to transfer data
between the connected devices. In a network, devices can communicate with each
other through transmission modes.
Transmission modes are used to direct the direction of the flow of
information and are also called communication modes.
Types of Transmission Modes
There are three types of transmission modes in computer networks as
follows
- Simplex Communication Mode
- Half-duplex Communication Mode
- Full-duplex Communication Mode
Simplex Communication
Mode
In simplex
communication mode, the information is communicated in only one direction.
There is only one transmitter and one receiver, hence the system is
unidirectional. The following are examples of simplex communication mode.
- Keyboard and Traditional Monitors.
- Radio Systems.
These devices can
only transmit the data and cannot receive it. The following diagram shows the
simplex communication mode between two connected devices A and B.
As you can see in the following diagram, A is working as a sender and B
as a receiver. Hence, the direction of data is from A to B.
Half-duplex Communication
Mode
In half-duplex mode,
the data flow is bidirectional, but not at the same time. It means both
connected devices can transmit and receive data, but not simultaneously. At a
time, the device can work either as a transmitter or receiver.
The examples are Transceiver and Walky talky set.
The following diagram shows a half-duplex mode between A And B. At a
time T1, A works as a transmitter and B as a receiver. At time T2, A works as
receiver and B as a transmitter.
Hence the At time T1 data flows from A to B and at time T2 data flow
from B to A.
Full duplex Communication Mode
In full-duplex mode,
the data flow is bidirectional. It means both connected devices can transmit
and receive data simultaneously. The devices can send or receive data at the
same time.
An example of a full-duplex mode is the telephone system.
The following diagram shows full-duplex communication between A and B.
A and B both work as sender or receiver. And data flow is also from both
directions.
