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8 Feb 2022

What is bandwidth? How many types and what?

Bandwidth is the amount of data that is transferred over a given channel at a given time.


 The unit of data transmission is calculated in bps (bit per second).


That is, the amount of data bits transferred per second is called bps.


 This is called Band or Bandwidth.


 Bandwidth calculation is used to explain the speed of different types of internet services. High-bandwidth service provides faster service.


Dial-up Internet service is a low-bandwidth connection.


 Broadband, such as DSL, cable, and satellite Internet services are high-bandwidth connections.


 Many DSL service providers offer high-bandwidth such as 768 kbps or higher.


 The cable internet service starts with 1 Mbps and speeds up to 30 Mbps


With a high bandwidth internet connection, a lot of data can be downloaded and uploaded in a quick time, easy video can be seen on the internet and audio can be heard.


Types of bandwidth


The bandwidth is divided into three parts based on the data transfer speed. Namely –







  • Narrowband:


Narrowband is usually from 45 to 300 bps.


This band is used for slow data transmission.


In general, the use of this band is more noticeable in telephony.


In telephony, Narrowband usually provides a frequency of 300 to 3400 Hz (Hz).


  • Voiceband:


Voiceband speeds are usually up to 9600 bps.


It is commonly used over the telephone. Telephone lines usually transmit data in frequencies from 200 to 3600 Hz.


In telephony, frequency division multiplexing is usually used at 4 kHz carrier spacing.


Voiceband is also used for transferring data from computer to printer or from card reader to computer.



  • Broadband:


Broadband is used for high-speed data transfer.


Broadband has a broad bandwidth and the ability to carry more data.


The band speeds up to 1 Mbps (megabytes/second) or higher.


This band is commonly used for digital subscriber line or DSL, radio-link, optical fiber, microwave and satellite communications.