Maximum Transmission Unit (MTU) Issues
http://sd.wareonearth.com/woe/jumbo.html
New York to Los Angeles. Round Trip Time (rtt) is about 32 msec, and let's say packet loss is 0.1% (0.001). With an MSS
of 1500 bytes, TCP throughput will have an upper bound of about 8.3 Mbps! And no, that is not a window size limitation,
but rather one based on TCP's ability to detect and recover from congestion (loss). With 9000 byte frames, TCP throughput
could reach about 50 Mbps.