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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.　　从停尸间再次醒来的萨蒂惊异于自己的死而复生，但不久她便发现，她已变成了嗜血如命的吸血鬼。在本性和人性间痛苦挣扎萨蒂决定摧毁邪教组织，为所有的受害者报仇……海洋和他The next day we slept until more than 12 o'clock. After getting up, we took a bus to Feixian County. When we arrived at Feixian County, it was about 2 o'clock in the afternoon. After getting off, we found an electric tricycle. Wang Jiying told the driver about the South Outer Ring. Wang Jiying directed the driver to get off a distance to the north of the house where we stole last time. After getting off the bus, we did not dare to take the main road. We came around the back of a large courtyard with military signs. There was a pumping station through the woods. We waited for the owner to go home to the north of the pumping station.老汉张开缺了颗门牙的嘴笑道：老了，眼神也不好了。In 1988, the 24th Olympic Games added a separate event for women.