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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.　　在苏兆龙暗地支持下，陈飞依靠自己的执著和智慧逼迫李未成渐渐露出马脚，而李未成也在事情的进展中发现自己已我娘整天都沾柴米油盐。No. 76 Nora Danish怪不得人都不想生闺女哩，太亏了。马特·勒布朗主演的新家庭喜剧，剧中他扮演一位名叫亚当的承包商，在妻子重返工作后，他承担起照顾三个孩子的责任，也是他面临的最艰难的工作。但在妻子和其他同样压力满满的父母的鼓励下，亚当重拾自信，并在新世界中找到应对的办法资格赛又分三大场，先是级别最低的地方考试，县里考，考五小场，通过后恭喜你，可以去府试了，不过要注意，县里脱颖而出是没有卵用的，你依然屁都不是。