The following are methods of improving network performance
Protocol acceleration
Satellite links involve an additional round-trip latency of approximately one second, and this limits the speed of TCP/IP communication. Wastie cites a real-life example of a 1Mbit/sec line with a latency of 1.1 seconds that achieves a maximum throughput of 100Kbit/sec. TCP acceleration removes that bottleneck and allows the line to run at its nominal speed.
Adjusting packet sizes can also help. As mentioned above, large file transfer packets can block small packets from interactive applications. The problem is that even if the small packets are prioritised, they may be delayed for the time it takes to send a large packet. The answer is to split the large packet into smaller pieces. This can be achieved by configuring the client, server or router.
Increasing the window size so the sender doesn’t wait for an acknowledgement of one packet before sending the next can reduce the effects of high latency, and incorporating error-correction information can reduce or eliminate the need for retransmission when an error does occur.
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