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High Speed Transport Protocols: An Attempt to Find the Best Solution
NAVAL POSTGRADUATE SCHOOL MONTEREY CA
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The development and advances in fiber optic technology are leading to major changes in modern telecommunications systems. In short, the transmission of data through optical fiber has become so fast that the computers which the fibers connect have become a bottleneck. The transport layer protocol, which is the software interface between the network and the computer, is one of the most important sources of this bottleneck. The purpose of this thesis is to investigate several high-speed transport protocols, evaluate them and attempt to determine which transport protocol or combination of transport protocols is optimal for high speed networks of the future. The approach is to first study the requirements of transport protocols for high speed networks. Then the properties of several specific transport protocols are studied with these requirements in mind. A detailed analysis of the strengths and shortcomings of TCPIP, XTP, and SNR are presented. TCPIP, which is in wide use today, was designed when transmission rates were much slower and error rates were much higher than today. XTP and SNR are two new experimental transport layer protocols which have been recently designed with high speed networks in mind. The primary contribution of this thesis is an evaluation of the requirements of future transport protocols. In short, TCPIP in its present form is simply not adequate it must change and adapt, or replaced by a new transport protocol like XTP, or SNR.
APPROVED FOR PUBLIC RELEASE