Related to signal processing (a measure of the width of a range of frequencies, measured in hertz) or the rate of data transfer (or throughput) measured in bits per second
Disambiguation:
Signal Processing: Measured in hertz, this represents the difference between the upper and lower frequencies in a signal or set of frequencies.
Computing: It is measured in a bit-rate (bit/s, Mbit/s, Gbit/s, etc.), thus representing the capacity of the network, in amount of data over time.