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<p>This seems to be valid:</p>
<ol>
<li>C->S: SYN</li>
<li>S->C: SYN/ACK</li>
<li>C->S: FIN/ACK</li>
<li>S->C: FIN/ACK</li>
<li>C->S: ACK</li>
</ol>
<p>A completely opened and closed TCP connection. Further, 2 and 3 can both contain data? Could you get a whole HTTP request/response in this conversation?</p>
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