I have been performing packet captures using wireshark and noticed that there are a large number of conversations that do not end with the typical FIN / FIN,ACK / ACK sequence of packets. Instead they end with FIN, ACK / FIN ACK / / RST. I've read that some conversations will end with a RST but the more structured method is the FIN / FIN,ACK / ACK sequence.
Can someone shed light on why these conversations are ending like this?
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