Editing Measuring network throughput (section)

==Theory: Short Summary==
The Maximum bandwidth can be calculated as follows:

<math> \mathrm{Throughput} \le \frac {\mathrm{RWIN}} {\mathrm{RTT}} \,\!</math> <!-- The \,\! is to keep the formula rendered as PNG instead of HTML. Please don't remove it. It matches the next formula. -->

where RWIN is the TCP Receive Window and RTT is the [[Round-trip delay time|round-trip time]] for the path.
The Max TCP Window size in the absence of [[TCP window scale option]] is 65,535 [[byte]]s. Example: Max Bandwidth = 65,535 bytes / 0.220 s = 297886.36 B/s * 8 = 2.383 [[megabit|Mbit]]/s. Over a single TCP connection between those endpoints, the tested bandwidth will be restricted to 2.376&nbsp;Mbit/s even if the contracted bandwidth is greater.