Unlike previous versions of Windows which had static receive window (RWIN) settings, XP Home Edition and XP Professional have dynamic settings.
Therefore, the default settings are based on maximum segment size (MSS) and Maximum Transmission Unit (MTU) setting, as well as responses from the Dynamic Host Configuration Protocol (DHCP) server and line speed. Windows uses even multiples of the MSS to calculate the RWIN, as described in the Microsoft Knowledge Base:
"The receive window specifies the number of bytes a sender can transmit without receiving an acknowledgment. In general, larger receive windows will improve performance over high (delay * bandwidth) networks. For highest efficiency, the receive window should be an even multiple of the TCP Maximum Segment Size (MSS)."
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by jazzman916  edited by JMGullett
last modified: 2007-02-21 16:32:46 |
