The theoretical speed is 1.25M, and the actual rate is about 20% or 20%. The unit of 800 KB --1000 KB bandwidth is bit . The unit of download speed is byte 1 byte = 8 bit , so 10M bandwidth = 1250 KB /s download speed is 100 megabytes
Bandwidth generally refers to the theoretical download speed, 0.5M=0.5*1024/8=512KB/8=64KB/s=512kbps, 1M=1024/8=128KB/s, 1.5M=1.5*1024/8=192KB/s , 2M=2*1024/8=256KB/s, 2.5M=2.5*1024/8=320KB/s, 3M =3*1024/8=384KB/s, 3.5M=3.5*1024/8=448KB/s , 4M=4*1024/8=512KB/s, 5M=5*1024/8=640KB/s, 6M=6*1024/8=768KB/s, 7M=7*1024/8=896KB/s, 8M =8*1024/8=1024KB/s, 9M=9*1024/8=1152KB/s,
10M=1280KB/s, 11M=1408KB/s, 12M=1536KB/s, 13M=1664KB/s, 14M=1792KB /s, 15M=1920KB/s, 16M=2048KB/s, 17M=2176KB/s, 18M=2304KB/s, 19M=2432, 20M=2560KB/s.
The unit of network transmission data K (thousand), M (mega), G (gigabyte) is not calculated by decimal 1000, but by binary 10th power 1024; the length of data is not 10 bits, but by computer processing binary The minimum length of data is calculated in 8 bits (8-bit, 16-bit, 32-bit CPUs, many are already 64-bit CPUs, but they are all multiples of 8, so they are calculated by 8 bits), 1KB=1024*8bit (English bit= The English abbreviation is b=Chinese digits), 1M=2 to the 10th power KB=1024B (B=Byte=byte=8b)=1024*1024*8b, 1G=2 to the 10th power M=1024M=1024* 1024KB=1024*1024*1024*8b.
The computer only recognizes two kinds of numbers, 0 and 1, which are equivalent to the on and off of lights, which are called binary numbers. If the computer CPU of 1 bit (the length of the data bit is 1 bit, that is, the length of the byte) calculates once in 1 second, its binary number 0 is flipped to 1 once, and you can see it when you stand outside the CPU for 1 second. To the two numbers 0 and 1, that is, the number of 2^1 (2 to the 1st power = 2), and 10 calculations within 1 second is equal to 2^10 (2 to the 10th power) = 1024, the 8 digits The CPU of the computer needs to exchange 1024 8-bit data with the outside world to calculate 10 times in 1 second, which is equivalent to a bandwidth of 1KB/s. 1K=1024, B=8-bit byte length, called 8bit in English, abbreviated as 8b. 1KB/s=1024*8b/s=8192bps.
bps is the English abbreviation of bit per second, which is expressed in mathematical notation : b/s, translated into Chinese is: bit/second, so bps=b/s≠B/s, KB/s cannot be expressed as KBps, generally See KBps, kBps as Kbps or as kbps.