![]() I'm using a Wireshark display filter for HTTP.I'm using a Wiresharp capture filter for the TCP port I'm interested in.I see these lines with a distance of 1 second, so there's always a green line (HTTP) and a black line (TCP retransmission) or a grey line (TCP) and a black line (TCP Dup ACK).a bug in the WinPCap driver? (Version 4.1.3).How do I find out the source of this retransmission? Is it Wireshark detects the second packet as TCP retransmission.the time increases by 2 microseconds (.811504000 /.the two frames have the same sequence number.Retransmitted TCP segment data (394 bytes) Sequence number: 10245 (relative sequence number) I'm observing TCP retransmissions like this: Frame 429: 448 bytes on wire (3584 bits), 448 bytes captured (3584 bits) on interface 0 I am requesting a URL (so the following happens with a HTTP GET request) from Firefox 50.0.2 and I'm using the auto refresh feature with a 1 second timeout.
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