A communication medium in which units of time considered during transferring the amount of data is called bandwidth.

High bandwidth speed connections easily download files from different websites in quickest way.

For digital signal bandwidth is measured in bits per second but in case of analog signals cycles or hertz are used as a measurement tool.

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Alexander Graham Bell (March 3, 1847 – August 2, 1922) was a Scottish-born scientist, inventor, engineer, and innovator who is credited with patenting the first practical telephone.