What is Data Transmission Modes?

In this article, we will discuss modes of data transmission – simplex mode, half-duplex mode, full-duplex mode.

Transmission Modes

  • Transmission modes define the direction of data transmission, it defines the direction of the flow of information between two communication devices.
  • Every data transmitted on the communication channel has a direction and this direction between two communication devices is defined by data transmission modes.
  • The transmission mode is a mechanism that decides the direction of data means in which direction the data will flow.
  • It is also referred to as data communication mode or directional mode.

There are three types of transmission mode

  • Simplex Mode
  • Half-Duplex Mode
  • Full-Duplex Mode


Data Transmission Mode


Simplex Mode

In simplex mode, Data can flow in only one direction means data communication is unidirectional.

In this mode, a sender can only send data but can’t receive it similarly, a receiver can only receive data but can’t send it.

The radio stations or TV channels are used the simplex mode. People can only listen or watch it but never allow it to transmit back.

Simplex mode

Examples of Simplex Mode

  • Keyboard or Mouse inputs to the computer.
  • CPU outputs to Monitor.
  • Computer-to-Printer.
  • Scanner-to-Computer.
  • Speaker is an example of one-way communication.
  • Microphone is also an example of one-way communication.
  • Radio and T.V Transmission



Half-Duplex Mode

In half-duplex mode, Data can flow in both directions but in one direction at a time means when one node is sending the data, then the receiving node has to wait.

When one device is sending the other can only receive and vice versa.

half duplex mode

Examples of Half-Duplex Mode

  • Walkie-Talkie: you can talk from both device but at one time only one person can talk and others can only listen.
  • Internet Browsers


Full-Duplex Mode

In full-duplex, Data can flow in both directions at the same time means a device can send as well as receive the data.

It is bidirectional.

Both sender and receiver devices can transmit data simultaneously.

We can send as well as we receive the data.

full duplex mode

Examples of Full-Duplex Mode

The best example of full-duplex is a Telephone Network where two persons can communicate simultaneously means both sides person can talk and listen at the same time.



Also Read: What is a computer network and Why we need a network?

Also Read: What is network topology and its types?


Frequently Asked Questions about Data Transmission modes

What is the data transmission mode of the keyboard and mouse?

Both Keyboard and mouse are the simplex mode, because they can only give input to the CPU, but cannot receive any input from the CPU.

Which mode is Radio and T.V Transmission?

Radio can only transmit the radio signals which is one-way communication, so it is the example simple mode.
T.V transmission is also a one-way communication, so it is also the simplex mode example.

What type of mode is an internet browser?

Internet browsers are the type of half-duplex mode because when the client sent any request, the server has to wait, and simultaneously when the server sent any information, the client browser has to wait.

Which data transmission mode is the hub device?

Hub device can only transmit data in half-duplex mode because the hub is just a repeater that amplifies the signal and sends it to the other ports except the source port.
In hub network, a collision occurs, if two devices try to communicate at the same time.

Which data transmission mode is the switch device?

In switch device, devices can communicate simultaneously with each other on the network, because switch does not broadcast data like hub.
Switch stores MAC addresses of all the connected devices and also stores the port numbers in his table. So switch device knows which device connected to which port. So switch network is the full-duplex data transmission mode.

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