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15The birthday note shows eight Arabic numerals to match your birthday.According to statistics, SYN attack is the most common and easily used attack method among all hacker attacks. I believe many people still remember the attack on YAHOO website in 2000. At that time, hackers used simple and effective SYN attacks. Some network worms cooperated with SYN attacks to cause greater damage. This paper introduces the basic principle, tools and detection methods of SYN attack, and comprehensively discusses the prevention technology of SYN attack.除了疼痛，整个人似乎也没有力气，尹旭暗笑一声，看来这次伤的不轻啊。Finger just touched the screen板栗机灵，议事的时候，还不忘安排个年纪最小的，把船缓缓地往前划。柯南立刻利用追踪眼镜的望远镜功能，沿着弹道发现了一个黑色的身影。“从那么远的距离进行狙击，怎么可能？！”柯南马上与女高中生侦探世良真纯乘坐摩托车追赶逃走的狙击手，意想不到的是狙击手居然连警察的巡逻车都打算一起炸掉，整个追踪过程都被其玩弄于股掌之中。结果，这场激烈的追踪将FBI也卷入其中，犯人以及狙击事件的谜团都消失在了大海里。