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For example, the bandwidth of a test station-target link is 32.461 Mbps as found by the Receive UDP test. The measured RTT is 0.9 millisecond. It gives us a BDP of 28315 bits (32.461 Mbps x 0.9 ms) or 3539 bytes. Rounding up this result to a multiple of the MSS value gives us 4380 bytes. If the combined size of the receive buffers cannot hold the BDP, the receive buffers must be increased in order to have optimal performances. It is important to increase the number of receive descriptors (RxDescNbr) accordingly.
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There are four options for the TCP receive test:
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