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Computer Network

Data Transmission in Network

by anupmaurya May 21, 2022
written by anupmaurya 0 comment
1.7K

Table of Contents

  • What is data transmission?
  • How does data transmission work between digital devices?
  • Serial Transmission
      • Asynchronous Serial Transmission
      • Synchronous Serial Transmission
  • When is serial transmission used to send data?
  • What is parallel transmission?
  • Advantages and Disadvantages of Using Parallel Data Transmission
  • When is parallel transmission used to send data?

In this article, you’ll learn about What is data transmission , How does data transmission work between digital devices , Serial Transmission , Parallel transmission and more.

What is data transmission?

Data transmission refers to the process of transferring data between two or more digital devices. Data is transmitted from one device to another in analog or digital format. Basically, data transmission enables devices or components within devices to speak to each other.

How does data transmission work between digital devices?

Data is transferred in the form of bits between two or more digital devices. The binary data in the form of 1’s and 0’s. The transmission mode decides how data is transmitted between two computers. There are two methods used to transmit data between digital devices:

  • Serial transmission
  • Parallel transmission.

Serial Transmission

When data is sent or received using serial data transmission, the data bits are organized in a specific order, since they can only be sent one after another. The order of the data bits is important as it dictates how the transmission is organized when it is received.

Serial Transmission of data
Serial Transmission of data

Serial transmission has two classifications: asynchronous and synchronous.

Asynchronous Serial Transmission

In Synchronous Transmission, data is sent in form of blocks or frames. Data bits can be sent at any point in time. Stop bits and start bits are used between data bytes to synchronize the transmitter and receiver and to ensure that the data is transmitted correctly. The time between sending and receiving data bits is not constant, so gaps are used to provide time between transmissions. Between sender and receiver, synchronization is compulsory. In Synchronous transmission, There is no gap present between data. It is more efficient and more reliable than asynchronous transmission to transfer a large amount of data.

Data Transmission in Network


The advantage of using the asynchronous method is that no synchronization is required between the transmitter and receiver devices. It is also a more cost-effective method. A disadvantage is that data transmission can be slower, but this is not always the case.

Synchronous Serial Transmission

Data bits are transmitted as a continuous stream in time with a master clock. The data transmitter and receiver both operate using a synchronized clock frequency; therefore, start bits, stop bits, and gaps are not used. This means that data moves faster and timing errors are less frequent because the transmitter and receiver time is synced. However, data accuracy is highly dependent on timing being synced correctly between devices. In comparison with the asynchronous serial transmission, this method is usually more expensive.

Data Transmission in Network

When is serial transmission used to send data?

Serial transmission is normally used for long-distance data transfer. It is also used in cases where the amount of data being sent is relatively small. It ensures that data integrity is maintained as it transmits the data bits in a specific order, one after another. In this way, data bits are received in-sync with one another.

What is parallel transmission?

When data is sent using parallel data transmission, multiple data bits are transmitted over multiple channels at the same time. This means that data can be sent much faster than using serial transmission methods.

Parallel Transmission of data
Parallel Transmission of data

Advantages and Disadvantages of Using Parallel Data Transmission

The main advantages of parallel transmission over serial transmission are:

  • it is easier to program;
  • and data is sent faster.

Although parallel transmission can transfer data faster, it requires more transmission channels than serial transmission. This means that data bits can be out of sync, depending on transfer distance and how fast each bit loads. A simple of example of where this can be seen is with a voice over IP (VOIP) call when distortion or interference is noticeable. It can also be seen when there is skipping or interference on a video stream.

When is parallel transmission used to send data?

Parallel transmission is used when:

  • a large amount of data is being sent;
  • the data being sent is time-sensitive;
  • and the data needs to be sent quickly.

A scenario where parallel transmission is used to send data is video streaming. When a video is streamed to a viewer, bits need to be received quickly to prevent a video pausing or buffering. Video streaming also requires the transmission of large volumes of data. The data being sent is also time-sensitive as slow data streams result in poor viewer experience.

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anupmaurya

Hey there, My name is Anup Maurya. I was born with love with programming and worked with TCS. One of best global (IT) services and consulting company as System Administrator . I also love graphics designing. It's my pleasure to have you here.

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