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An Investigation into Transport Protocols and Data Transport ...

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Contents 7<br />

8.2 Test Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . 150<br />

8.2.1 Response Function . . . . . . . . . . . . . . . . . . . . 150<br />

8.2.2 Bottleneck Queue Size . . . . . . . . . . . . . . . . . . 154<br />

8.3 Results . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 159<br />

8.3.1 Symmetric Network . . . . . . . . . . . . . . . . . . . . 160<br />

8.3.2 Asymmetric Network . . . . . . . . . . . . . . . . . . . 169<br />

8.3.3 Friendliness . . . . . . . . . . . . . . . . . . . . . . . . 176<br />

8.4 Discussion of Results . . . . . . . . . . . . . . . . . . . . . . . 182<br />

8.4.1 Goodput . . . . . . . . . . . . . . . . . . . . . . . . . . 182<br />

8.4.2 Fairness <strong>and</strong> Friendliness . . . . . . . . . . . . . . . . . 183<br />

8.4.3 Responsiveness/Convergence Time . . . . . . . . . . . 185<br />

8.4.4 Overhead . . . . . . . . . . . . . . . . . . . . . . . . . 187<br />

8.5 Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 188<br />

9 <strong>Transport</strong> Over Wide Area Networks 190<br />

9.1 Transfer Tests Across Dedicated Private Wide Area Networks 190<br />

9.1.1 Methodology . . . . . . . . . . . . . . . . . . . . . . . 191<br />

9.1.2 Calibration . . . . . . . . . . . . . . . . . . . . . . . . 194<br />

9.1.3 Results: CBR Background Traffic with 1 New-TCP Flow196<br />

9.1.4 Results: CBR Background Traffic with 10 New-TCP<br />

Flows . . . . . . . . . . . . . . . . . . . . . . . . . . . 198<br />

9.1.5 Results: Multiple Flows . . . . . . . . . . . . . . . . . 200<br />

9.1.6 Results: Impact . . . . . . . . . . . . . . . . . . . . . . 203<br />

9.1.7 Discussion of Results . . . . . . . . . . . . . . . . . . . 205<br />

9.1.8 Summary . . . . . . . . . . . . . . . . . . . . . . . . . 213<br />

9.2 Preferential Flow H<strong>and</strong>ling Using DiffServ . . . . . . . . . . . 214<br />

9.2.1 Methodology . . . . . . . . . . . . . . . . . . . . . . . 216

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