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On the one hand, the core components of the network infrastructure have never changed in the past ten years, which makes some discovered and exploited vulnerabilities and some mature attack tools have a long life cycle and are still valid even today. On the other hand, the rapid development of the application of the Internet seven-layer model has diversified the attack targets of DDoS. From the web to DNS, from the three-layer network to the seven-layer application, from the protocol stack to the application App, the endless new products have also given hackers more opportunities and breakthrough points. Moreover, DDoS protection is a project with unequal technology and cost. Often, the construction cost of a business's DDoS defense system is larger than the cost or benefit of the business itself, which makes many start-up companies or small Internet companies unwilling to make more investment.Related Articles:也不说什么‘必有厚报之类的话，且看将来。Rudder Right Shift + Rightward Arrow Shift + Rightward Arrow-缅甸大毒枭乌澎狡猾诡诈地利用假情报,假目标,遥控炸车等残忍手段,杀害我方卧底"山鹰",炸死我缉毒民警,将一百公斤海洛因落地我国境内,并欲借中国通道运往美国.云南方面严重受挫,而由福建方面查控的另一线索也因证据不足被迫让监控对象离境.你想想，老将军为何要派你们三个小将去？不等黎章回答，她便自己道：自然是综合各方面的条件，你们最合适的。　　同室的一个疯囚犯又以为他是奸细，对他拳脚相加。但在他呆了三年之后，万念俱灰，上吊自尽时，那疯汉却救活了他，并告诉他自己名叫丁