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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.该片讲述的是一名警察潜伏进入韩国最大黑帮之中当卧底，在黑帮大佬死后发生了继承者的夺权争斗，面对着比警察方面还要更加相信自己黑帮二把手，以及把自己当做游戏一般的警察高层人员，卧底警察陷入了矛盾之中的故事。Http://www.jiemian.com/article/2062824.html埃里克·邓恩（Eric Dane）饰演一艘海军驱逐舰的舰长钱德勒（Captain Chandler），在侥幸躲过一场让地球上大多数人丧命的灾难后，作为为数不多的幸存者，他必须要和船员们寻找出路。We first went to the village committee and obtained the consent of the leaders of the village committee. With their assistance, we arranged a row of tables and stools in the courtyard. Two sphygmomanometers were placed on the table, flyers were posted on the wall, banners were hung and flags were erected. Teacher Zhao informed the villagers to come to the village committee on the radio. After everything was ready, we waited for the villagers to arrive with leaflets, brochures and questionnaires. After the announcement was broadcast, villagers came soon. The students greeted them with smiles, handed out knowledge books to the villagers, explained scientific knowledge to the villagers, and conducted a questionnaire survey. Since most of the villagers could not read, we all asked them one question at a time. It may be easy to do one survey, but it takes great patience to do many. In addition, the villagers generally speak local dialect, and some students have some obstacles in communication, but we have all overcome various difficulties. Some of the students are handing out leaflets, some are answering villagers' questions, some are doing investigations, and some are measuring blood pressure for villagers. The teachers are even more integrated with everyone, and they can no longer tell who is the student and who is the teacher. Gradually, the number of villagers increased, and everyone was even more busy. Look at this lively scene: there are investigations, leaflets, interviews, blood pressure measurements and photos-everyone is really busy! In this way, we successfully completed the task of the first stop.