TCP Acceleration(from Silver Peak)

最新推荐文章于 2023-07-31 20:33:19 发布

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本文介绍了SilverPeak如何通过TCP窗口扩展、选择确认、往返时间测量及高速TCP等技术优化TCP性能，提高广域网(WAN)的数据传输效率。

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Silver Peak optimizes the performance of TCP across the WAN by employing the following functions:

Window Scaling - Silver Peak utilizes the TCP Window Scale option to deliver window sizes as large as 1GB. This overcome the throughput limitation imposed by the standard 64 KB TCP window size in higher latency networks.
Selective Acknowledgement - Selective acknowledgements (SACK) provide a mechanism for handling multiple packet loss in a WAN environment. They give the sender a complete picture of which segments are queued at the receiver and which have not yet arrived, enabling the sender to retransmit only the missing data segments
Round-Trip Measurement - Silver Peak utilizes a proprietary round trip measurement scheme that enables RTTs to be calculated more efficiently. This leads to more accurate RTO (retransmission timeout) measurements which, in turn, improves throughput.
HighSpeed TCP- Silver Peak has implemented HighSpeed TCP, which is a modification to TCP's congestion control mechanism for use with TCP connections with large congestion windows. It alters how the window is opened on each round trip and closed on congestion events as a function of the absolute size of the window. This enables TCP to perform better in high-bandwidth, high-latency environments.