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In the process of DNS resolution, the client initiates a query request, and the DNS server may need to make additional queries to complete the resolution process and give a response, which will consume certain computing and network resources. If an attacker uses a large number of controlled hosts to continuously send resolution requests for different domain names, the cache of the DNS server will be continuously refreshed, and the failure of a large number of resolution requests to hit the cache will cause the DNS server to consume additional resources for iterative queries, which will greatly increase the resource consumption of the DNS server.Updated February 7影片讲述的故事发生在一个荒无人烟的无人区，淘金人老裴发现了地下隐藏着巨大的金矿。消息不胫而走，一群对金钱极度渴望的人对这个金矿垂涎欲滴。小偷，强盗，骗子，恶势力团伙等各路人马迅速杀往戈壁滩，相互之间使出各种阴谋诡计为的只是一个目地——杀死老裴 得到金矿。于是，老裴一家与突然到访的不速之客们之间展开了一番斗智斗勇的周旋与较量。李敬文默然无语，扶爹进屋歇息不提。市的繁忙给青少年带来丰富物质的同时也让新一代青少年与原汁原味的乡村生活渐行渐远，《台风少年行》让台风少年团的5名青春阳光的少年放下手机等电子产品，从城市来到乡村，互帮互助，学会劳作，享受自然，度过16天自给自足的生活，完成一场青春的历练和成长。This standard is proposed by the General Administration of Civil Aviation of China.Public int calculation (int num1, int num2) {