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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.Home Operator4: Fake fabrics are hard and really soft. This is the hard injury of fake fabrics, and so is NIKE elite socks.张丹枫文韬武略，风流倜傥，虽然是张宗周的儿子，张士诚的后人，但却是个热血男儿，为不使汉人的江山被外族蹂躏，他秘密由瓦剌潜来中原，助明朝抵抗瓦剌的入侵，也先派人追杀他。明皇帝亦因其是张士诚的后人而要杀害他，武林豪杰在未明张丹枫的来意之前亦要杀他，张丹枫遭遇几许惊心动魄的危机"Well, This is basically the case, After they all flew, they stayed in the air for a while. Then he rushed towards the position in a dark way. The closer you fly, the louder the sound will be. Finally, when the flight was just around the corner, The sound made my ears ache a little, But as we got closer, Can see some details clearly, These things are the kind of big wasps I mentioned earlier. However, they are at least dozens of times larger than ordinary wasps, one by one like birds. Their wings are flapping very fast, and because of the large number, when they fly less than 30 meters away from us, I can even feel a breeze blown by the collective flapping of their wings.