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Is TCP Dup ACK considered as a duplicated packets also ? TCP Duplicate ACK, the TCP segment is zero. In your upload, the TCP segment is 10.

Why I have the same for my retransmission packets plz ? This is not normal for a TCP retransmission, but there isn't a rule that the IP ID must be different. it appears the sniffer captured the same packet. It could be a loop, wiring, or mirror configuration