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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.公元1582年(万历十年)夏天的北京，怪事与奇案叠起。先是大明内库储银不翼而飞，从各地府县运来的大宗税银突然不知去向，国家铸银局的熔银大炉也因无银可铸而被迫停炉；接着便是被送入诏狱的两个江洋大盗神秘越狱，城外一个以做棺材为业的村子在一夜之间被杀戮一空；更可怕的是，一股来路不明的号称“江洋八子”的犯罪集团突然显身大街小巷和王公府邸……　　全慧珍饰演宋佳京，她是女主裴多美工作的门户网站的理事。十二号，十二号怎么样，入得了王爷的眼么？杨长帆被如此簇拥，实在不知道怎么谈，混乱之中，他看见了一个羞涩的光头竟然也在注视着自己。118. X.X.101王突盯着黄豆看了一眼，见他默然无语，便摇摇头。"Do you miss them?"