很多謝站長的回覆, 真是令我得益不淺呀, 多謝!
同時今晚我也收到親友的回覆, 可作大眾參考, 可惜全是寫英文的, 我想在台灣教學水平那麼高, 英文是無問題的呀. 原文如下:
Quote from Bryan: "There are 8 bits to a byte.
So 3 mbps is equivilent to 3,000,000 divided by 8 or [375,000 Bps or 375 KBps]."
But you have to divide by 1,024 to go from Bytes to KiloBytes, because PCs use base-2.
See
http://lyberty.com/encyc/articles/kb_kilobytes.html
So for the question "3.0Mbps/768Mbps ..translate to about 3000kb/sec I get when downloading?"
the answer is:
3.0/768 means 3000/768, which means 3000 kilobits per second (kbps) Download (maximum), and 768 kilobits per second (mbps) Upload (maximum).
Most connections will give you about 80% of your maximum; so that would translate to
about 2400 kbps down/ 615 kbps up.
To translate to practical file transfer speeds:
2400 kbps = 2,400,000 bits
2,400,000 bits / 8 = 300,000 Bytes
300,000 Bytes / 1,024 = 293 KiloBytes
So your download speed (at 80% of maximum)
should be around 293 KiloBytes per second,
or "293 KB/s".
The maximum of 3.0 mbps is equal to:
((3*1,000,000)/8)/1024 = 366 KB/s
Another good speed tester (compare to others in your area):
http://www.broadbandreports.com
Also, do note that your speed also depends on the server that you're downloading from. From your picture, it looks like you are downloading some sort of chinese document, which may reside on a farther destination if i'm not mistaken. That is why I asked you to download from microsoft.com which has very fast servers to test your speeds.