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101. X.X.215SYN 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.《神府红军游击队》以朴实无华的手法，描写了在1933年至1937年这一血雨腥风的艰苦岁月里，身处陕北的神(木)府(谷)人民，为反对国民党的黑暗统治，建立了陕北神府地区第一支共产党领导的革命武装——神府红军游击队，并从七个人的游击队发展成威武坚强的红军三团，创建了神府地区第一个革命根据地——神府、葭榆根据地。该剧从四名刚刚迈入大学校园的女生的视角展开，讲述了她们在大学四年中的成长故事。In any case, in the history of the United States, there has been an unprecedented security problem in what should have been the least affected department of the Government. Microsoft President Brad Smith was shocked by the seriousness of the attack. He compared the situation to "Tomahawk missiles were stolen from the army" and published a harshly worded blog article saying that the US government failed to ensure information security.有一天，在校生新谷贞一遇见穿着现在已被停用的黑水手服的不可思议的女学生。那位女学生称自己正是“旧校舍的幽灵”夕子，并希望贞一协助她找出自己的死因与真相。等待他们的究竟是如何的未来呢？这一回我们的英雄——代号007的英国特工詹姆斯·邦德，在北朝鲜发现了另一位世界级的媒体大亨，盖斯特维·格瑞乌斯的阴谋诡计。这个邪恶的阴谋家妄图利用一枚宛如第二颗太阳的卫星来挑起战争、控制地球。而经过调查，007发现盖斯特维实际上只不过是经过特殊整容处理后的原北朝鲜领导人Zao。现在，被捕的007必须抓紧时间逃出监狱并找到Zao，以阻止战争的爆发，制止整个阴谋。 　　经过一系列38度线上的惊险动作场面，邦德终于越过了安全区逃离了朝鲜。为了追踪Zao，邦德辗转香港、古巴，并再次回到伦敦。在这里，邦德与一忠一奸两位美国间谍展开合作，她们一位是性感的金克斯(Jinx，哈莉·贝瑞)，另一位则是神秘的米兰达·福斯特(Miranda Frost，罗莎蒙·派克)。就此，邦德和金克斯联手行动，共同对抗整个事件的幕后黑手。其间两人更是暗生情愫，将爱情与任务交织在了一起，而子弹便成为了他们的见证人。