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A TCP connection is a quad, and a connection is uniquely determined by the source IP, the source port, the destination IP and the destination port. Therefore, if C wants to forge the packet from A to B, it should fill in the above-mentioned IP header and TCP header with the source IP, source port, target IP and target port. Here B is the server, IP and port are open, A is the target we want to attack, IP certainly knows, but the source port of A is not clear, because it may be randomly generated by A. Of course, if we can find out the rule of generating source port for common OS such as Windows and Linux, we can still do it. In addition, we can step on the connection port of Car A through a large number of controlled hosts.张云峰来到城里打工，陪伴自己心爱的女友谢华丽上大学。却碰上女友同学徐丽，并在其危难时刻施救。之后徐丽便对张云峰紧追不舍。与此同时患有心脏病的女友进了医院，为凑齐手术费，张云峰准备参加格斗赛，训练中被女友闺蜜柠檬发现，通过柠檬介绍，张云峰在训练馆与寒天、阿浪学习专业拳击，并通过了初赛和复赛。为取得决赛胜利开始了魔鬼般的训练，并意外获得扫地大妈的指点。张云峰带着决心和勇气踏上擂台，挽救自己心爱的女友谢华丽。而是碧瑶杀的……之前我做了一系列任务，终于攻略下碧瑶，和碧瑶结为伴侣，然后一起闯荡江湖。刑场之上，李毅是否能逃过一劫？东厂赵忠和锦衣卫纪纲究竟谁能取胜？大喇嘛的阴谋能否得逞，这一切，都是未知•••••由日本作者大宙征基绘制的动漫《12岁第二季》日语版又名:少女,主要角色有:加隈亚衣齐藤壮马原纱友里,讲述正就读六年级的12岁小女生绫濑花日（加隈亚衣配音）利用课间和同学们讨论恋爱和初吻的话题，少女的幻想引起同学的嘲笑，一时间教室里乱哄哄的。就在此时，过早的男生发表女生评选结果，心机女浜名心爱（原纱友里配音）夺得榜首。当正准备宣读最糟糕女生时，花日上前阻止，而帅气的男孩高尾（齐藤壮马配音）则制止了纷Around these problems, Rui Yi interviewed the founders of some children's thinking ability training institutions, parents who have invested capital in this field and have let their children receive thinking ability training.