Data Transmission Modes in Computer Networks | Simplex, Half Duplex, Full Duplex

Data transmission mode :

The way or mechanism in which data is transmitted from one device to another device is known as transmission mode.This data transmission mode also known as “ communication mode “.

So we can say, the data is transmitted from one device to another device through a transmission mode . The transmission mode decides the direction of data in which the data needs to travel to reach the receiver system or node.The transmission mode is defined by in the physical layer.

The transmission mode divided into 3 category -

1) Simplex mode

2) Half duplex mode

3) Full duplex mode

Simplex

In simplex communication all data flow is unidirectional .A simplex communication channel only sends information in one directional . Only one of the two devices on a link can transmit , the other can only receive.

For example , a radio station usually sends information in one direction t the audience but never receives signal form them. Another keyboards, monitors,TV station.

Advantage of simplex mode :

In simplex capacity of the transmission medium is utilized as the transmission is one way . It means the station can utilize the full entire bandwidth of the communication channel, so that more data can be transmitted at a time and cannot have traffic issues.

Disadvantage of simplex mode :

Bidirectional communication is not possible.So two devices can not communicate with each other using simplex mode of transmission.means It has no inter-communication between devices.

Half duplex

In half duplex mode, data can be readmitted in both directions on a signal carrier except not at the same time. This allows the sender and receiver to communicate with one , but has to wait for the other when they do so . In this way half duplex can have a higher performance output over the simplex channel since information can flow in both direction . At a certain point,it is actually a simplex channel whose transmission direction can be switched.

Walkie-talkie is a typical half duplex device. It ha s “ Push - to- talk “ button which can be used to turn on transmitter bur turn off the receiver.

Advantage of Half-duplex :

In half duplex mode, both the devices can send and receive the data and also can utilize the entire Bandwidth of the communication channel during the transmission of data.

Disadvantage of half-duplex:

The two way Communion can not be established simultaneously at the same time.When one device is sending data, then other has to wait.

Delay in transmission may occur as only one way communication can be possible at a time

Related :

>> difference between simple,half duplex and full-duplex,

Full-duplex

A full duplex communication channel is able to transmit data in both directions on a signal carrier at the same time . It is constructed as a pair of simplex links that allow bi-directional simultaneous transmission take telephone as an example, people at the both ends of a call can speak and be heard by each other at the same time because there are two communication paths between them . Thus ,using the full duplex mode can greatly increase the efficiency of communication.

Advantage of full-duplex:

Both station can send and receive the data at the same time.

It is the fastest mode of accommodation between devices

Disadvantage Full duplex:

The capacity of the communication channel is divided into two parts.Also no dedicated path exists for data transfer.

It has improper channel bandwidth utilization as there exist two separate paths for two communicating devices

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Data Transmission Modes in Computer Networks | Simplex, Half Duplex, Full Duplex