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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.在布达佩斯的某豪华酒店举行世界国际象棋比赛。Cal Fournier，22岁，法国国际象棋冠军，不成熟的天才型选手。第一天比赛，就因宿醉迟到，昏睡赛场，临近比赛结束才醒来还能漂亮地击败对手。而一个不起眼的九岁匈牙利小男孩选手使原本波澜不惊的赛局泛起丝丝涟漪。One-day bus ticket, 600 yen for adults and 300 yen for children, can take any bus in Nagoya on the same day.RitthaWittayakhom这所学校不止有“优秀生”，还独有一个“尖子班”。这是一间只有通过了选拔的学生才有资格进来补习的教室。能进来的学生，比别人“特别”得太多。但一个叫Bang的高一学渣男，偶然间考进了这个“尖子班”。在尖子班的学习带给了他无尽的迷茫，他还从这群新同学身上，察觉出这间教室有某种怪异。最终，他们发现了，这个尖子班正视图唤醒他们身体里的某种“超凡能力”。他们的生活起了变化，这种天赐也足以成全他们的每一个梦想，但仍旧有着无尽的烦恼。更重要的是，这些特异功能正把他们引向某种秘密，某种该学校正尽力掩盖的秘密……Shutter speed is also called slow shutter. It consists of an automatic shutter and a slow shutter of 1 to 16 seconds.