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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.郑氏问：你说，另外一个人叫白凡？张槐点头道：嗳。你的生命只有不多的时间,如果有机会重返15岁,你会怎么抓住这最后的机会呢,五位55岁的人,他们分别是唱歌走音的歌手,单身老同志,优秀配音员,失败拳手,严格的女教师,有一天他们几个突然都变成了15岁的孩子一个黑影缩在最里边洞壁旁，死死地咬牙屏息，恨不得自己不再出气、没了心跳才好。朱承开（温兆伦 饰）与王一正（吴启华 饰）是相识多年的同事兼好友，个性和脾气迥然不同的两人曾经联手破获过不少的难解奇案。朱承开后因为性格火爆与同事产生龃龉辞去了警察的职位，转而成为了保安公司的调查科经理。故事发生在二十一世纪末的日本。魔法，这不是一个传说，而是现代科学的一项技术。它被应用至今已经过了一个世纪。曾经被称为「超能力」的先天具有的能力被以“魔法”这个名字的体系替代，高超的的魔法师被认为是国家的实力。西历 2095 年的春天，新生入学的季节。国立魔法大学附属第一高校——通称“魔法科高校”，是由成绩优秀的“一科生”，和作为一科生替补的“二科生”所构成，他们也各自被冠上了“花冠（bloom）”，以及“杂草（weed）”之名。就在这样的魔法科高校里，一对兄妹入学了。