Windows 7 の windump でキャプチャしました。
telnet www.google.com 80 の結果です。

22:52:15.697847 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: S 2581826888:2581826888(0) win 8192 <mss 1392,nop,wscale 2,nop,nop,sackOK>
22:52:15.708440 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: S 1118236489:1118236489(0) ack 2581826889 win 28800 <mss 1392,nop,nop,sackOK,nop,wscale 6>
22:52:15.708525 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: . ack 1 win 16704
22:53:13.262409 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: P 1:2(1) ack 1 win 16704
22:53:13.278877 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: . ack 2 win 450
22:53:13.445112 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: P 2:3(1) ack 1 win 16704
22:53:13.453792 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: . ack 3 win 450
22:53:13.665549 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: P 3:4(1) ack 1 win 16704
22:53:13.677343 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: . ack 4 win 450
...
22:53:21.398073 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: P 17:19(2) ack 1 win 16704
22:53:21.407557 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: . ack 19 win 450
22:53:21.407616 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: P 1:520(519) ack 19 win 450
22:53:21.407708 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: F 520:520(0) ack 19 win 450
22:53:21.407767 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: . ack 521 win 16574
22:53:21.414892 IP6 XXXX.52375 > 2404:6800:400A:802::1011.80: F 19:19(0) ack 521 win 16574
22:53:21.423568 IP6 2404:6800:400A:802::1011.80 > XXXX.52375: . ack 20 win 450