broadband - Technology behind speed test

Question

I was wondering what is the technology behind Internet Speed test, which some websites use to check your speed e.g; http://www.speedtest.net/

The reason behind this question is, i wanted to write my own with one more feature and that is to keep checking speed after some interval so that i can have better idea of what i am getting for what i am paying for.

I am not sure if this question belongs to stackoverflow, so please forgive me if it is not.

Thanks.

Answer 1

从服务器下载相当大量的数据（N 字节）。记录需要多长时间。(M 秒) 下载速率为每秒 N/M 字节。

重复上传。

Answer 2

它不是那么简单。例如，您如何知道您将用于下载文件的协议将利用整个网络容量，因此您将能够找到您的网络速度？您只会找到下载文件的速度。如果这是你感兴趣的，那么好的。速度测试不只是下载一个大文件。它使用更先进的技术。

Answer 3

您下载已知大小的文件并测量时间。那么速度就是文件大小/时间。