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Probability is greatly reduced = probability is 100%Zhang ShaohanSYN attack is a kind of DOS attack. It takes advantage of TCP protocol defects and consumes CPU and memory resources by sending a large number of semi-connection requests. SYN attacks can not only affect hosts, but also harm network systems such as routers and firewalls. In fact, SYN attacks can be implemented as long as these systems turn on TCP services no matter what systems are targeted. As can be seen from the above figure, the server receives the connection request (syn=j), adds this information to the unconnected queue, and sends the request packet to the client (syn=k, ack=j+1), then enters the SYN_RECV state. When the server does not receive an acknowledgement packet from the client, it retransmits the request packet and does not delete this entry from the non-connection queue until the timeout. With IP spoofing, SYN attacks can achieve good results, Typically, clients forge a large number of non-existent IP addresses in a short period of time, SYN packets are continuously sent to the server, and the server replies to the confirmation packets and waits for the confirmation of the customer. Since the source address does not exist, the server needs to continuously resend until it timeout. These forged SYN packets will occupy the unconnected queue for a long time, normal SYN requests will be discarded, the target system will run slowly, and in serious cases, the network will be blocked or even the system will be paralyzed.湾仔一间酒店内，一个潦倒警察正准备吞枪自杀；一个妒火中烧的丈夫跟踪怀疑来偷情的妻子，打算玉石俱焚；一个为生活而沦落风尘的女新移民误杀嫖客，准备毁尸灭迹……就在此时，大堂响起广播，宣布酒店有人确诊得到疫症，即时封锁酒店七日。此消息一出，触动酒店内所有人的神经。潦倒警察会否改变决定，放弃自杀？丈夫是否查出妻子真的出轨？女新移民会否被人发现是杀人凶手？七天隔离即将结束，各人回到正常的世界，但他们的人生，会否有所变化？到了地方，见两少年兴致高昂，对一切都新鲜好奇，索性不伸手，让他们四处张罗安排。在这个浩瀚无垠的空间之内，不是只有凡人所认知，只存在著当下的世界而已，而是有著十二个时空跟一个诡谲邪恶的魔界共生著，这个故事就由其中之一的“金时空”开始展开……农村姑娘田枣考上了大学，来到了省城，为陪伴灵芝上学未婚夫福根也进了城。为了实现明星梦的元宝、一直想发大财的六哥、羡慕城里人生活的丽丽、消极逃避责任的胡哥等怀揣不同的目地都汇聚到了省城，开始了他们漫长而艰辛的城市打工生涯。面对眼花缭乱的新生活，福根始终坚守自己的勤劳、善良和诚实，与田枣的情感却分分合合；元宝为了实现自己的梦想不惜牺牲了自己的爱情；六哥的生活起起落落很是艰辛；丽丽为过上城里人的生活付出了巨大的代价，胡哥也在福根的劝说下勇于承担责任。最终，福根用他可爱的傻劲与无限的真诚感动了这座城市，感动了许许多多执迷不悟的人们，在城里闯出了一片天地并赢回了属于自己的爱情。