1. Usually the download speed display is expressed in KB, this is B instead of lowercase b, and the unit used by operators is b.
1. The unit of broadband rate: bps
Bps is the abbreviation of bits per second, which means bits per second, which means bits (bytes) per second, and is used to describe the data flow per unit time.
2. The basic unit of network speed is byte B, kilobyte KB.
K is thousand, M is mega, B is Byte (byte), b is bit (bit), bps is bit second, 1B (Byte)=8b (bit), 1MB/s=8Mbit/s=8Mbps, using 8 base.
3. 1MB=1024KB, 1024MB=1GB, 1TB=1024GB, and 1024 is used in between.
1KB=1024B，1KB/s=1024B/s，1MB=1024KB， 1MB/s=1024KB/s
4. In our actual Internet applications, when downloading, we often see that the download speed is displayed as KB/s or MB/s, and the calculation unit of the operator is Mb/s, so we must be able to convert these two units.
The 200M broadband mentioned by the operator is 200Mbit/s. So the download rate of 200Mb/s broadband is 1024*200/8=25600KB/s, here is a simple method, 1024/8*200=128*200=25600KB/s, that is to say.
Divide the download unit KB by 128 to get the operator's broadband calculation unit Mb/s,
for example:
The operator said 300Mb/s broadband, so the real download rate is 300*128=38400KB/s.
If KB/s is to be converted to MB/s, it must be divided by 1024,
And 38400KB/s divided by 1024=37.5MB/s
Of course, the easiest conversion method is to divide 8Mb/s by 8=1MB/s
For example, the operator's 300M broadband is 300Mb/s divided by 8=37.5MB/s
The unit system is different, but the result is the same, so don't confuse the calculation unit.
The broadband access rate unit of general operators is: Kbps, Mbps; the specific relationship is 1KBps=8Kbps, 1Mbps=1024Kbps.
Broadband Rate Comparison Table
Second, how to calculate the real broadband download speed?
Look at the picture above, usually the unit of our broadband processing is actually Mbps, for example, the processing broadband rate is 500M broadband, which is actually 500Mbps; the processing of 1000M broadband is actually 1000Mbps.
For conversion, based on the theory of 1024 and octal,
1Bps=8bps； 1Mbps=1024kbps
So 1Mbps=1024kbps/8=128KBps;
So the download speed of 500M broadband is up to 64000KBps
Simple calculation, 1Mbps=1024KBps/8=128KBps,
The most convenient calculation formula is 1Mbps*128=128KBps
If it is 500Mbps*128=64000KBps
Of course, you can check it, 1Mbps=1024kbps
Then 500Mbps=500*1024Kbps/8=64000KBps,
1000Mbps=1000*1024Kbps/8=128000KBps，
So, if you apply for a 500M broadband, the theoretical download speed limit is actually 64000KBps/1024=62.5MBps.
Looking at the picture above, it is actually within the normal range as low as 38400/1024=37.5MBps.
Because the actual download speed is different from the theoretical maximum speed, the download speed has a reasonable range due to various factors.