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(2) Ships with limited maneuvering capability.上个世纪八十年代初，马龙、丁一鸣、曹剑、洪飞和孟秋等六人是大学同班同学。大学即将毕业的时候，马龙为了能留在吴州发展，忍痛抛弃了深爱自己的郭岚，投入了高干子弟孟秋的怀抱。马龙的举措引来了昔日好友丁一鸣、曹剑的不满，与马龙反目。洪飞觊觎郭岚的美貌已久，在郭岚失恋的时候，想趁机侮辱郭岚，被曹剑所救。曹剑带着郭岚远渡重洋，奔赴美国。从此，六个同学天各一方。麻将大师过三洞的孙女蒋青青被自己的未婚夫周学博和殷梦洁追杀为了麻将真诀。中途蒋青青掉落悬崖并失忆，被打麻将骗钱的张晓飞带回家。周学博得知后威胁欠下自己钱的张晓飞让其套出真诀和银行密码。张晓飞在过程中帮蒋青青恢复了记忆并揍了周学博。却被周学博用其威胁换取真经。蒋青青用真诀换了晓飞并在殷梦洁招待会上向其宣战，最后张晓飞带奶奶帮助青青打败了殷梦洁。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.让主考官来定：谁的妻妾最多，谁就是状元，这不更省事？大伙儿可享福了，也不用十年寒窗苦读了，只管往家里纳女人就成。Due to the increasing organizational cost of attacks, some malicious attacks may even become cover activities for larger-scale and more ferocious security threats.