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DDOS attacks mainly occur in the network layer. Its most obvious characteristic is to send a large number of attack packets, consume network bandwidth resources and affect normal users' access. At present, the detection and defense technology for DDOS attacks in the network layer is quite mature, and at the same time, some new attack methods-DDOS attacks in the application layer have emerged. Different from network layer DDOS attacks, application layer DDOS attacks mostly imitate the access behavior of legitimate users and will not generate a large number of attack data packets during data transmission, but they will consume server resources through a large number of database queries and other operations, which is more difficult to detect. According to the different attack modes, DDOS attacks include reflection amplification attacks in addition to ordinary flooding attacks. This type of attack often uses a legitimate server as a reflector, which sends a large number of data packets to the target, thus causing greater harm. At present, DDOS attacks against DNS servers are also common. Attackers often send fake domain names to DNS servers, consuming DNS server resources. At the same time, due to the recursive query mechanism in DNS servers, DDOS attacks against DNS servers have a large impact range.水道一头，东面岸边，停泊着两只狭长的小船，可供四五人乘坐，上面横七竖八架了许多支橹。　　在生与死面前，仅剩的六名姐妹最后看了一眼深爱的大地，手挽手，拉响了手榴弹。英雄配美人，或者说是英雄难过美人关也都是很完美的事情。谢雅真（郭书瑶 饰）表面看来只是一名平凡的少女，可实际上，她拥有着一双能够洞悉阴阳两界的双眼。父母在谢雅真很小的时候就将她送入庙中修行，拜在金胜在（陈慕义 饰）门下，她的工作就是利用自己的特异功能，帮助客户们解决那些发生在他们身上的，科学无法解释的事件。 在学校里，谢雅真尽己所能的低调行事，因此显得有些格格不入，除了她最好的朋友黄巧薇（郑茵声 饰），没有人知道谢雅真的另一重身份。一次偶然中，谢雅真邂逅了名为何允乐（蔡凡熙 饰）的转校生，趣味相投的两人很快就成为了知己，与此同时，美好的感情亦因为何允乐的存在而在谢雅真的内心里渐渐萌芽。2249