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155-175The attack uses the method of sending a large number of domain name resolution requests to the attacked server, Usually the domain name requested to be resolved is randomly generated or does not exist on the network. When the attacked DNS server receives the domain name resolution request, it will first look for whether there is a corresponding cache on the server. If it cannot be found and the domain name cannot be directly resolved by the server, the DNS server will recursively query the domain name information from its upper DNS server. The process of domain name resolution brings a great load to the server. If the number of domain name resolution requests exceeds a certain number per second, the DNS server will time out to resolve domain names.The time for expert review is not counted within the time limit for examination and approval, but the maximum time limit shall not exceed 30 days. The specific measures for expert review shall be formulated and published by the Fire Department of the Ministry of Public Security.　　但赛特的训练一直不顺利，总是引起纠纷给村子里的人添麻烦。《星际迷航：发现号》宣布续订第3季，并加入Michelle Paradise(《初代吸血鬼》《南国医恋》)，和Alex Kurtzman一起担任运作人。第3季2020年上线。以黑川翔子的报导文学改编,在一所被称为底层学校的县立高中,一年内多达相当一个班的40名学生辍学,教师们努力解决现代社会两极化下中学生面临的各种问题,描述基于一个关于新老师的冲突和成长的真实故事。