码率单位

Feature	Bandwidth	Traffic	Throughput
Definition	Maximum data transfer rate	Actual data being transmitted	Actual data transfer rate achieved
Measure	Capacity (bps)	Data volume (bytes or packets)	Transfer rate (bps)
Static vs. Dynamic	Static (connection property)	Dynamic (varies over time)	Dynamic (affected by network conditions)
Impact on Performance	Determines potential data transfer speed	Affects network congestion and utilization	Measures actual network performance

表格一览：

名称	符号	b/s	B/s	示例
比特每秒	b/s	1	1/8
字节每秒	B/s	8	1
千比特每秒	kb/s	1000 = 10^3	125 = 10^3/8
二进制千比特每秒	Kib/s	1024 = 2^10	128 = 2^10/8
千字节每秒	kB/s	8000 = 8*10^3	1000 = 10^3
二进制千字节每秒	KiB/s	8192 = 8*2^10	1024 = 2^10

k 与 Ki

k 与 Ki 分别表示 kilo-（千） 与 kibi-（二进制千） 。作为前缀使用时， k 表示 1,000，Ki 表示1,024，因为“Ki”来源于它在计算机方面 2^10 = 1,024 的使用。不幸的是，人们常常错误地用 K 代替 Ki。此外，不知晓其中微妙差别的广大公众，常常不加区别地使用“Kbps”与“Kibps”，造成了混乱。总之，使用“Kibps”通常是正确的。

The bit rate is expressed in the unit bit per second (symbol: bit/s), often in conjunction with an SI prefix such as kilo (1 kbit/s = 1,000 bit/s), mega (1 Mbit/s = 1,000 kbit/s), giga (1 Gbit/s = 1,000 Mbit/s) or tera (1 Tbit/s = 1,000 Gbit/s).[2] The non-standard abbreviation bps is often used to replace the standard symbol bit/s, so that, for example, 1 Mbps is used to mean one million bits per second.

When quantifying large or small bit rates, SI prefixes (also known as metric prefixes or decimal prefixes) are used, thus:[3]

0.001 bit/s = 1 mbit/s (one millibit per second, i.e., one bit per thousand seconds)

       1 bit/s = 1 bit/s (one bit per second)

1,000 bit/s = 1 kbit/s (one kilobit per second, i.e., one thousand bits per second)

1,000,000 bit/s = 1 Mbit/s (one megabit per second, i.e., one million bits per second)

1,000,000,000 bit/s = 1 Gbit/s (one gigabit per second, i.e., one billion bits per second)

1,000,000,000,000 bit/s = 1 Tbit/s (one terabit per second, i.e., one trillion bits per second)