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2018-07-26 21:19:31 +0000	marked best answer	Please explain this TCP Retransmission Sequence Hi All, I hope I am doing the right thing asking this here. I'm new to all this. Below is an extract from a pcapng file. I can't attach the file because I don't have enough points. I have googled and googled but I am not a network guy and I am having trouble understanding what wireshark is trying to tell me. This sequence below repeats over and over. It should just be a big message from .200 to .182 with a 1 byte response, and then a short message from .182 to .200 with a 1 byte response. Is every message in each direction really getting re-transmitted and are the TCP-Dup ACK and TCP-Keep Alive's a problem? Sorry for the formatting. Happy to re-post in another way if it helps. edit: capture is hosted on cloudshark here: https://www.cloudshark.org/captures/5... Thanks in advance, Brad. 1 14:58:25.934858 10.10.10.200 10.10.10.182 TCP 53740 → scp-config(10001) [PSH, ACK] Seq=1 Ack=1 Win=63198 Len=1005 1059 2 14:58:25.934860 10.10.10.200 10.10.10.182 TCP [TCP Retransmission] 53740 → scp-config(10001) [PSH, ACK] Seq=1 Ack=1 Win=63198 Len=1005 1059 3 14:58:25.968185 10.10.10.182 10.10.10.200 TCP scp-config(10001) → 53740 [ACK] Seq=1 Ack=1006 Win=2048 Len=0 60 4 14:58:25.968186 10.10.10.182 10.10.10.200 TCP [TCP Dup ACK 3#1] scp-config(10001) → 53740 [ACK] Seq=1 Ack=1006 Win=2048 Len=0 60 5 14:58:26.024675 10.10.10.182 10.10.10.200 TCP scp-config(10001) → 53740 [PSH, ACK] Seq=1 Ack=1006 Win=2048 Len=1 60 6 14:58:26.024676 10.10.10.182 10.10.10.200 TCP [TCP Keep-Alive] scp-config(10001) → 53740 [PSH, ACK] Seq=1 Ack=1006 Win=2048 Len=1 60 7 14:58:26.074496 10.10.10.200 10.10.10.182 TCP 53740 → scp-config(10001) [ACK] Seq=1006 Ack=2 Win=63197 Len=0 60 8 14:58:26.074497 10.10.10.200 10.10.10.182 TCP [TCP Keep-Alive ACK] 53740 → scp-config(10001) [ACK] Seq=1006 Ack=2 Win=63197 Len=0 60 9 14:58:26.120072 10.10.10.182 10.10.10.200 FMTP Operational message 89 10 14:58:26.120074 10.10.10.182 10.10.10.200 TCP [TCP Retransmission] scp-config(10001) → 53740 [PSH, ACK] Seq=2 Ack=1006 Win=2048 Len=35 89 11 14:58:26.120075 10.10.10.200 10.10.10.182 TCP 53740 → scp-config(10001) [PSH, ACK] Seq=1006 Ack=37 Win=63162 Len=1 60 12 14:58:26.120075 10.10.10.200 10.10.10.182 TCP [TCP Keep-Alive] 53740 → scp-config(10001) [PSH, ACK] Seq=1006 Ack=37 Win=63162 Len=1 60
2018-07-26 21:19:31 +0000	received badge	● Scholar (source)
2018-07-19 10:24:03 +0000	commented answer	Please explain this TCP Retransmission Sequence Try now pls..
2018-07-19 07:45:44 +0000	commented answer	Please explain this TCP Retransmission Sequence Hi Eddi, The IP ID in the IP header is identical. The trace was captured on a laptop attached to the spanning port of a
2018-07-19 07:45:35 +0000	received badge	● Editor (source)
2018-07-19 07:45:35 +0000	edited question	Please explain this TCP Retransmission Sequence Please explain this TCP Retransmission Sequence Hi All, I hope I am doing the right thing asking this here. I'm new to
2018-07-19 07:34:29 +0000	commented answer	Please explain this TCP Retransmission Sequence Hi Eddi, The IP ID in the IP header is identical. The trace was captured on a laptop attached to the spanning port of a
2018-07-19 06:30:02 +0000	asked a question	Please explain this TCP Retransmission Sequence Please explain this TCP Retransmission Sequence Hi All, I hope I am doing the right thing asking this here. I'm new to