PCMark: TCP Performance
The PassMark Advanced Network Test, a part of PerformanceTest, is designed to test the data transfer rate between two computers both of which must be running PerformanceTest. One of the computers acts as the server and will wait for a connection while the other computer acts as a client.
Fixed Block Size
To test the maximum throughput speed that a wireless connection can handle, a fixed block size of 16384 Bytes is sent from the client to the server over a period of five minutes. The higher block size will allow the transfer rate to stay as high as possible – in the same way that large files transfer from one drive to another quicker than lots of small files of the same total size.
Variable Packet Size
In a real world situation, the blocks of data that pass through a wireless adaptor are not of the same size each time, so to give a more realistic impression of how an adaptor performs, the adaptor is once again tested at each range for a period of five minutes. This time however, the block size will vary from 32 Bytes up to 16384 Bytes in increasing steps of 148.7 Bytes each time.
The TPC protocol only managed to provide us with about 40 Mbps at the best of cases. It isn’t an impressive result in itself, but it would be more than enough for surfing the web and streaming media.