Data rate and
data transfer rate can refer to several related and overlapping concepts in communications networks:
Achieved rate
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Bit rate, the number of bits that are conveyed or processed per unit of time
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Data signaling rate or gross bit rate, a bit rate that includes protocol overhead
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Symbol rate or baud rate, the number of symbol changes, waveform changes, or signaling events across the transmission medium per unit of time
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Data-rate units, measures of the bit rate or baud rate of a link
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Data transfer rate (disk drive), a data rate specific to disk drive operations
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Throughput, the rate of successful message delivery, or level of bandwidth consumption
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Transfers per second
Capacity
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Bandwidth (computing), the maximum rate of data transfer across a given path
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Channel capacity, an information-theoretic upper bound on the rate at which data can be reliably transmitted, given noise on a channel
