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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.王墨是天启的粉丝，所以对《寻秦记》的广告一点也不反感，甚至有机会，他也会去帮忙宣传。子时初，刘黑子父子亲自守在二院上房外，刘老婆子也在三院照看，张家一家老小则聚在老两口房里说事。喜姑姑忙赔笑道：我跟了太太那么长时候，咱家的规矩还不晓得？只要是用心干活的，出头也容易的很，工钱高不说，就算偶然间大意出错了，太太也不会死揪住不饶人。你今后也不要再来了，合适的时候，我自会联系。太可怕了，谁想看啊。