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　　8. What Can A Song Do?Reset authentication takes advantage of the reliability of TCP protocol, and DDOS protection system responds to syn first. When the protective device receives syn, it responds to syn_ack and sets the Acknowledge number to a specific value (recorded as a cookie). When the real client receives this message and finds that the acknowledgement number is incorrect, it will send a reset message with a sequence number of cookie + 1. The source of the forgery will not have any response. In this way, we can add the real client IP to the white list. ?Avoidance = Agility * 1< script type= "text/javascript" >……六月一日。就在众人为女子担心的时候，一只还没有小孩巴掌大的小鸟飞来，白发女子脚尖在小鸟背上一点，小鸟顿时一惊，翅膀扇扇，头部微微向后面看去，这时白发女子已经消失在白云之中了。Catalytic dehydration theory: mainly refers to changing the thermal cracking process of fibers to dehydrate and prevent the generation of combustible substances.