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对于结下深厚友情的他们来说，这应该是一个过于简单的游戏——Section 3 Rules of Action of Ships in Case of Poor VisibilityThe visitor mode is more appropriate when changing the algorithm, because the visitor mode makes it easy to increase the operation of the algorithm.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.看有没人注意他，就跟做贼似的。