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2. Udp flood attack如何反天？亦是不知。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.Avoidance = Agility * 1以「新兵日記」校園版包裝模式推出的「我的老師叫小賀」，劇名中的「叫小賀」為台語發音，表示「有膽識、有Guts」之意.在这种局面下，一位联邦军的老将军匿名为库瓦克·萨尔瓦，建立起秘密反政府组织“马夫蒂·纳比尤·艾林”(由苏丹、阿拉伯及古爱尔兰语合成的名字)，针对联邦高官展开了暗杀等一系列恐怖活动。一个由四人组成的团队从总部派往维修一个通讯站，突然在一座山的山峰上遭遇了恐怖袭击。两个被征召的土耳其士兵，一个受过教育，富有的年轻人，另一个粗鲁的街头聪明的恶棍，不得不抛开他们的分歧，学会相互信任，以度过一个无情的局面。