Bandwidth (computing)

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In computing, bandwidth is the bit-rate of available or consumed information capacity expressed typically in metric multiples of bits per second.

Variously, bandwidth may be characterized as:

  • Network bandwidth
  • Data bandwidth
  • Digital bandwidth

Bandwidth in other fields

The term bandwidth is used differently in such fields as:

  • Signal processing
  • Wireless communications
  • Modem data transmission
  • Digital communications
  • Electronics

In these fields, bandwidth is used to refer to analog signal bandwidth measured in hertz, meaning the frequency range between lowest and highest attainable frequency while meeting a well-defined impairment level in signal power.

The connection to the computing term is that, according to Hartley's law, the digital data rate limit, or channel capacity, of a physical communication link is proportional to its bandwidth in hertz.

See: (signal processing).

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