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ACK reflection attack is a common reflection attack technique, Using TCP three-way handshake, When the source IP address of SYN is disguised as Target's IP and the transmitter try to establish TCP connection, the reflector's response will be directly forwarded to Target. In the process of attack, a large number of ACK responses responded by the reflector will be sent to Target by controlling a large number of controlled hosts to perform the clock operation, thus occupying Target's network bandwidth resources and causing denial of service.《神探夏洛克第二季》第一集承接上一季最后一集的剧情，从被炸弹和狙击枪威胁的夏洛克(本尼迪克特·康伯巴奇饰)和华生（马丁·弗瑞曼饰）和莫里亚蒂(安德鲁·斯科特饰)第一次正式会面开始。接着夏洛克在接受白金汉宫一份重要委托的案件中遇到了亦正亦邪的神秘女子艾琳·艾德勒(拉娜·普尔弗饰)，一位旗鼓相当的对手，一个使他心动的女子。这一次莫里亚蒂使大众相信夏洛克所有的事迹全是虚构，使之变成一个伪英雄名誉扫地。而为了彻底打垮夏洛克迫使他跳楼，莫里亚蒂竟立刻吞枪自杀，结局到底如何，夏洛克会因此中了他的圈套吗？武侠剧「铁血大旗门」剧情迂回曲折，人物关系错综复杂，结局出人意表，引人入胜。剧情讲述由云翼（关海山）率领之大旗门当年因护宋帝昺失败而归隐大漠，十五年后欲重出江湖，却因儿子云铿（陈庭威）与仇家之女冷青萍相恋而事败，翼被逼再次归隐，而云铮（刘青云）及铁中棠（石修）却受此事连累而被逐出师门。冬子有些歉意地看着葫芦，公堂上争得比他说的激烈多了本剧是一部具有传奇色彩的侠客英雄史诗，为我国首部西部侠客剧。为保证《狼侠》的传奇色彩，全部外景地均选在西南边陲四季如春的玉龙雪山、香格里拉(中甸)草原。尤其是千年古城丽江首次对摄制组全面开放，成为该剧最吸引人的视觉亮点；内景则选定著名的丽江木府，更加强了本剧唯美的风格。著名摄影师那日苏（代表作《悲情布鲁克》等）担任拍摄，更是不同凡响。一流故事，一流外景，再加上一流幕后制作，使全剧无一处不显示出前所未有的恢宏大气的风格。To give a comprehensive example, you can look at it according to the above figure. According to the source channels of users, do targeted germination retention. For example, this source channel is a red envelope download from Android application market or a bonus game on WAP side, so this part of users can be considered as profit-seeking, and there can be corresponding profit-seeking activities on the landing page of the client, which can improve retention.我心目中的大侠就该是这样。