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If an attack is detected, the management center will start a cleaning scheme to pull the mixed traffic of attack traffic and normal traffic through BGP, CDN, etc. Pull the mixed flow to the flow cleaning center for cleaning. The problem in the process of traffic cleaning is that the current DDOS attacks present a mixed attack state with multiple attack methods coexisting. In this case, how to efficiently detect attacks is the main problem currently facing. After consulting numerous data, Huawei's "seven-layer cleaning plan" is found to be very enlightening. The scheme comprehensively analyzes data packets for mixed traffic through seven layers of defense measures such as static filtering, abnormal message filtering, scanning and snooping message filtering, source legitimacy authentication, session-based prevention, feature identification filtering and traffic shaping, so as to detect attack traffic to the greatest extent. The framework of Huawei's "seven-layer cleaning scheme" is shown in Figure 2. After the traffic is cleaned, the attack traffic is discarded, and the normal traffic is injected back into the network through MPLS, GRE tunnel technology, etc.郑氏忙道：公爹让人回来说，他不家来吃晚饭了，去田上酒家跟我爹喝酒去了。但是现在韩信和彭越都参与进来了，彭越也就罢了，最要命的是韩信。JAIN目击自己的孪生兄弟杀害了自己的父母，二十年后，她等待着自己的兄弟来杀自己。二十年来，她一直接受武术的训练已准备这个会面。《本能》讲述曾任职中央情报局的情报员Dylan（Alan Cumming饰），离职后的他原本想建立了一个「正常」的生活，当起一位有才华的教授兼作家，不过当纽约警察向他寻求协助，希望他阻止个在逃的连环杀手时，他又得重回自己的旧生活了。The so-called event distribution mechanism is actually the distribution process of MotionEvent.(5) Number, position and dynamics of ships detected by radar;