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seamless passing of TCP traffic. It will also verify the maximum throughput for TCP traffic. Typically in the field,
after running layer 2 & layer 3 tests successfully, a customer may still complain that their connection is slow to
deliver their applications. Running a stateful TCP test will help verify maximum throughput rates in the down-
load and upload direction. If throughput performance is poor, the test can help identify what the issue could be.
TCP Protocol and Overview
Fundamental TCP parameters are the ideal TCP Window Size and Throughput. The complete list of relevant
measurements include:
TCP Window Size
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TCP Throughput
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Number of Connections Established
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Download Time
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File Transfer Size
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Retransmits
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Transmission Control protocol is the most widely used transport layer protocol. TCP is used by most applic-
ation protocols: HTTP, FTP, Telnet. It provides the following services:
End-to-end connection
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Multiplexing/Demultiplexing of separate sessions
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Flow control
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