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Http://www.jiemian.com/article/2062824.htmlReflective attacks typically use protocols that do not require authentication or handshake, The reflection attack needs to forge the source ip address of the requested data into the ip address of the target. If the protocol used requires authentication or handshake, the authentication or handshake process cannot be completed and the next attack cannot be carried out. Therefore, most reflection attacks are carried out by network services based on udp protocol.(4) A sailboat.谢福安（陈乔恩 饰）一直渴望着拥有和祖母一样动人的初恋故事。祖母黄春香在六十年前，因为前往山中，邂逅了受伤昏迷的严旺财。二人就这样一见钟情，可最后还是因为种种原因分离，只留下一枚手表做信物。好像发生在小说里的情节，却让福安艳羡不已。最大的中药集团八宝堂药业集团所有人严云高（丁强 饰）意外昏迷，被送进医院。除了外孙严阳（修杰楷 饰）真心感到担心外，其他的人都希望云高速速断气。而正气感十足的福安毅然决然决定要救活云高。而殊不知，云高就是自己外婆口中的旺财。而那边，云高的长孙严大风（蓝正龙 饰）则怪福安多管些事。互看对方不顺眼的二人，孽缘就这样展开，福气又安康的故事就此拉开序幕……这才露出转忧为喜，露出甜美的笑容。(2) Detection of control coil. The detection of the control coil of the time relay is shown in the following figure.2-3 0-2 3-0