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3. Practical Feelings现在是全民娱乐的社会，相信我，你的读者肯定会对这个感兴趣的。　　然而，一片辉煌的镜州腐败问题相当严重。现任省委书记郑秉义和省委副书记李士岩坚定不移地支持刘重天。在镜州问题查处期间，派刘重天协助齐全盛主持镜州的全面工作你打小就坚强，这次你一定要挺过去，槐子叔和菊花婶子还等着你呢。　　君臣二人一心玩乐，荒废朝纲，致使举国上下怨声载道，强梁四起。以及时雨宋江（李雪健 饰）为首的一八零八位好汉相继登上梁山，一众好汉闹江州、三打祝家庄、战青州。搅得大宋江山沸沸扬扬……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.