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DDOS attacks mainly occur in the network layer. Its most obvious characteristic is to send a large number of attack packets, consume network bandwidth resources and affect normal users' access. At present, the detection and defense technology for DDOS attacks in the network layer is quite mature, and at the same time, some new attack methods-DDOS attacks in the application layer have emerged. Different from network layer DDOS attacks, application layer DDOS attacks mostly imitate the access behavior of legitimate users and will not generate a large number of attack data packets during data transmission, but they will consume server resources through a large number of database queries and other operations, which is more difficult to detect. According to the different attack modes, DDOS attacks include reflection amplification attacks in addition to ordinary flooding attacks. This type of attack often uses a legitimate server as a reflector, which sends a large number of data packets to the target, thus causing greater harm. At present, DDOS attacks against DNS servers are also common. Attackers often send fake domain names to DNS servers, consuming DNS server resources. At the same time, due to the recursive query mechanism in DNS servers, DDOS attacks against DNS servers have a large impact range.安东尼·麦凯、詹米·多南加盟科幻惊悚片[同步](Synchronic，暂译)。艾伦·穆尔黑德、贾斯汀·本森([无尽])执导，贾斯汀·本森操刀剧本。麦凯、多南在片中饰演新奥尔良两名医护人员，一种离奇药物的出现导致了一系列恐怖死亡事件，两人的生活也被彻底打乱。XYZ Films负责该片国际发行。二年级的女孩何西西是一个有公主梦的“女汉子”，善良可爱又充满奇思妙想， 而她的哥哥上初中的何东东却是一个“安静的美男子”。兄妹俩都在“德馨学园”上学，本剧围绕着东东西西兄妹和他们身边的家长、老师以及小伙伴们展开。每一集都是以孩子的清澈眼睛、纯真心灵为视角的小故事，以小见大地涵盖社会、人伦、环保、生存、信仰等问题，潜移默化地普及“爱、美、责任”的精神内核。This article is the fourth and last in a series on how to use artificial intelligence to build a robust anti-abuse protection system. The first article explains why AI is the key to building a robust protection system, which is used to meet user expectations and increasing complex attacks. After introducing the natural process of building and starting an AI-based defense system, the second blog post covers the challenges related to training classifiers. The third article discusses the main difficulties in using classifiers to prevent attacks in production.虽然如此，但楚军突围的心太盛，掉头回去？停滞不前？都不可能。所以。