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From the perspective of service, DDoS protection is essentially a war in which users are the main body and rely on anti-D protection systems to compete with hackers. In the whole process of data confrontation, service providers often have absolute initiative. Users can base on specific rules of anti-D system, such as traffic type, request frequency, packet characteristics, delay interval between normal services, etc. Based on these rules, users can better resist DDoS of the seven-layer class and reduce the resource overhead of the server on the premise of satisfying the normal service itself. The detailed schematic diagram is as follows:张良不由的咯噔一下，要是这样的话，这件事情可就真的有些复杂了。　　阴差阳错，让三个人的缘分暂时中断。直到三年后的一天，未了的情缘继续上演……The Interface Segmentation Principle (ISP) means that it is better to use multiple specialized interfaces than to use a single total interface. That is to say, don't let a single interface take on too many responsibilities, but should separate each responsibility into multiple specialized interfaces for interface separation. Too bloated an interface is a kind of pollution to the interface.　　《天空之城》以美丽的西双版纳的热带雨林为背景，讲述了发生在澜沧江边的美丽爱情故事。1.2 Launch and amplify attacks