We are currently testing some network equipment (consumer routers with 1 Gbit/s ports) with Jpef 2.0. All kinds of connection parameters are tested: wired and wireless, different wireless standards, TCP/UDP, etc.
When not specifying a TCP window size, the performance is low (300 mbit/s). If you enter a high value, the throughput is much better (900 mbit/s). Google tells that Windows uses TCP Window Scaling, there is no "standard" TCP Window size.
What should we use as the TCP Window size in Jperf?