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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.-Excerpt from the enthusiastic and explosive discussion of teammates after a pleasant team formation.A long time later:知名武侠作家天启开办的公司，而且还是全球最前卫的网络文学，自己更是公司的第一批元老，这些稍微想一想，就让顾小玉兴奋到睡不着觉。如此，也就是韩信真的要自立？项羽不着调韩信自立到底是一件好事还是坏事。嗯，你们放心，寡人一定会主持公道，不会亏待你们。How to set the moving distance when moving pictures in AI. Pacific Computer Network [Reference Time 2017-12-25]