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However, many enterprises have already found the clue when they are attacked for the first time, and security managers also need to give an answer as to whether malicious attacks will come back. Therefore, although CSO people do not want to talk much, we still hope to know their handling attitude. In order to avoid unexpected troubles, we reported the experiences of several CSO's in the work in an anonymous form, and discussed why the security strategy that had always worked failed in the end.(2) Purposeful practice is focusedThe SYN-ACK retransmission number server sends the SYN-ACK packet. If the customer confirmation packet is not received, the server retransmits for the first time, waits for a period of time but still does not receive the customer confirmation packet, and retransmits for the second time. If the retransmission number exceeds the maximum retransmission number specified by the system, the system deletes the connection information from the semi-connection queue. Note that the waiting time for each retransmission is not necessarily the same.该剧主要讲了警察Bishop和Pike两人搭档在伦敦东区追击罪犯的故事。从表面上来看Bishop和Pike有许多共同之处，他们不仅很酷，而且聪明又强硬；此外他们两人关系很好，总是能够支持和帮助对方。然而，他们的家庭背景不同，加入警察队伍的动机也不同，工作之外的情感生活因此也不同。Bishop在养老院和街头长大，从不认识他的父亲。Pike来自理想的家庭，他跟随警察父亲的脚步加入警局，同时渴望做出自己的成绩。尽管存在着这些差异，但Bishop和Pike都保持着相同的道德准则。即使他们之间的化学反应看起来随时会爆炸，但他们的工作仍然非常出色。“世上每种文化，都提到过小人族的故事”，传说、神话、童话……不计其数的人曾经幻想在山林里、草丛中、罐头盒里或是地板下，找到自己的袖珍同类。英国作家玛丽·诺顿（1903-1992）以五册幻想小说《借东西的小人》系列，在英美家喻户晓；这是一部荣获卡内基儿童文学奖与路易斯·卡罗尔书籍奖的童话名作，它用精彩的故事讲述了友情、生存、自由等永恒的话题。十六岁的“借物一族”少女阿丽埃蒂和爸爸妈妈一起住在一座大房子的地...2009.8-20世纪少年：第三部 我们的旗帜