3456	0.907776	306.108009	[Server IP]	[Client IP]	TCP	1514	[TCP Previous segment not captured] 80  >  [Client Port] [ACK] Seq=4345 Ack=151 Win=30080 Len=1448 TSval=442638 TSecr=1313882

(Then several client packages with the same ACK number but no flag of duplicate ACK)

3482	3.769772	308.970005	[Server IP]	[Client IP]	TCP	1514	[TCP Retransmission] 80  >  [Client Port] [ACK] Seq=2897 Ack=151 Win=30080 Len=1448 TSval=443354 TSecr=1314247