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Facing TCP's three-way handshake protocol, how should attackers launch attacks? The attacker first intentionally initiated a handshake packet. After receiving it, the server puts it into the waiting queue and returns an acknowledgement. Secondly, the attacker will no longer send the third acknowledgement packet, thus the server will make multiple retransmissions (the Linux system configures the number of retransmissions through tcp_synack_retries), consuming a lot of extra overhead, and the waiting queue will be occupied, even the waiting queue will be full, eventually causing the server to be unable to receive the client's request. This is the attack.1941年纳粹德国对苏宣战，毗邻苏联远东地区的满洲国，以成田为首的“北进派”随时可能对苏侵犯。面对腹背受敌之危，苏联远东情报局决定实施代号为“论持久战”的秘密计划。中共党员秘密唐飞受命执行该计划，化身瓦吉姆上校打入敌人内部。在保安局结识了因国仇家恨而潜入的抗日民主分子蔡梦科长。在保安局里唐飞以他的英勇机敏，获得了成田的信任，成为保安局的重要人员。但在远东情报局的内鬼，导致唐飞最终掉进了福原设计的陷阱，暴露了自己。但唐飞还是机智地完成了不可能完成的“论持久战”计划。苏共格拉西姆将军决定用一名重要的日本间谍交换唐飞，但唐飞认为他已经完成了任务，不愿组织付出无谓的代价。在交换的瞬间，他跳下山崖。唐飞的舍生取义感动了蔡梦。二战结束之际，在海滨疗养院里，唐飞睁开眼看见的第一个景象，是晨曦中的蔡梦。以朝鲜光海君为了逃避被毒杀的危机，便由与其相貌酷似的平民代替了王的身份为主题，讲述光海君在朝鲜历史上消失的那15天里所未人知的故事。Amazing Hotels: Life Beyond The Lobby sees Giles Coren and Monica Galetti roll up their sleeves to work alongside staff in some of the most extraordinary hotels across the globe. 　　With wonder, curiosity and humour, they learn tricks of the trade and discover what it takes to offer once-in-a-lifetime experiences in awe-inspiring locations.婚后的马修（杰森·席格尔 Jason Segel 饰）和莉莉（艾丽森·汉妮根 Alyson Hannigan 饰）决定搬出和泰德合租的公寓，二人用尽积蓄买下一套新房，却发现房子是歪的。虽然他们的生活偶尔有磕磕碰碰，但是小两口的日子总体过得十分美满幸福。Praise! ! ! ! ! ! ! ! ! ! ! ! ! !I will try to adjust the parameters according to my understanding of the nature of the data and the theory behind the algorithm. If I cannot explain why the results are getting better or worse, I will find this adjustment strategy unreliable.