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Spirent KB Article
Doc ID: FAQ19635
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Spirent TestCenter: Do "Frame Size" matter for a TCP or EL4-7 test case?
Yes, the throughput would be independent from the frame size given the traffic from the streams are stateless, and when using Raw TCP or Enhanced L4-7 which are statefull they should not have effect on one another. TCP and Enhanced L4-7 are different, Raw TCP is usually configured from within STC on its profile once the technology is selected, i.e.
Enhanced L4-7 is a more detailed test with more parameters & protocols within it, that can use its own web based GUI to define the settings more intuitively.
Product : Spirent TestCenter