This paper considers two architectures. The main elements of the first of these architectures is shown in figure 1 . The diagram shows web clients located in NZ connecting to a NZ proxy. There are three TCP connections involved in fetching a web page. The first connects the web client to the NZ proxy, the second is between the two proxies and the third is from the US proxy to the US server.
Multiplexing is implemented between the proxies.
That is the data for different replies may be interleaved on a single TCP connection between the proxies. It is expected that multiplexing will improve the efficiency of the international link. In most cases the TCP segments will be the maximum MSS size. Because the connections between the proxies persist indefinitely the effect of TCP slow start is greatly reduced over the international component of the network, which is where slow start would otherwise have the greatest effect. The number of concurrent TCP connections between the proxies may be limited.