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Sub. Add (new Observer1 ());Q: Which sub-area of machine learning do you pay most attention to?不过回来之后就少了一些享乐，及时地开始准备迎战随时可能杀过来的楚军。听到陈启的答复，吕文心总算稍微安心一些。The 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.清晨，陈启起床后，简单洗漱一番，炒了一个蛋炒饭。