How are data rates measured?

Answer 1

The transmission speed generally is measured by transferring a specific block of data of known size across the transmission medium and timing the duration between initiating transfer and successful receipt of the final datum. For instance, to test the speed of a modem connection, you could create a known file of, say, exactly 1,000,000 bytes, then initiate a transfer of that file across the modem link. If the transfer takes 7 minutes 25 seconds, you have a data rate of 1,000,000 bytes per 7:25, or 2,247 bytes per second.

Data transmission speeds are usually given in bits per second, or bytes per second. For fast connections, this is sometimes expressed as kilobits, megabits, or gigabits per second, or as kilobytes, megabytes, or gigabytes per second. One must be very certain to indicate whether a data rate is counting bits or bytes, and one must be aware that marketers will try to conceal that difference; a marketing data rate may be expressed in bits per second but made to look like bytes, or it may be expressed as the theoretical maximum data rate, rather than the actual data rate. An example of the latter is the 802.11g wireless networking standard, which is always shown as 54 megabits per second. That is the raw data rate; once signaling overhead, error correction, link control, and other non-data information is excluded, the actual rate for data transfer in a perfect connection is closer to 33 megabits per second.

Answer 2

Data transfer rate or bit rate is used to gauge how fast data is transmitted from one source to another. It is measured usually in multiples of the unit bits per second or seldom in bytes per second.

Answer 3

Baud Rate is generally, if incorrectly, used for modems. Its unit of measurement is usually claimed to be in bits/second.

The actual data rate transfer is measured in bits per second, abbreviated bps.

The baud rate is actually the measure of transitions per second. A 56kbps modem actually only changes its output amplitude, phase, and frequency 1200 times a second, but uses amplitude and phase to encode multiple bits into a single state. The actual baud rate of any modem faster than 1200bps will be about 1200 baud, that being the highest number of transitions per second you can reliably get through a phone line.

Answer 4

The networking industry refers to bandwidth as a measure of the maximum rate of data transmission.

Answer 5

the speed of the internet is messured in mega bits per second pr Mbps

Answer 6

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