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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.不错，不要低估了敌人，魏豹也不简单啊。Even, if a course can persist in completing the study, it will return part of the tuition fee or have prizes, such a course is worth considering, because a good incentive mechanism will be easier to persist in.付宇锋义愤填膺地说道。板栗轻笑一声，咕哝道：谢什么？葫芦不语，心道，谢你把淼淼还给我。《倚天屠龙记》是著名武侠小说改编的电靓剧集。演员有汪明荃、郑少秋、赵雅芝 、黄淑仪、夏雨、石坚、江毅、黄新、关海山、张活游等，阵容鼎盛。 　　故事说倚天剑、屠龙刀重现江湖，引起武林纷争。武当张五侠﹝夏雨﹞奉师命调查。后与天鹰教的殷素素﹝黄淑仪﹞结为夫妻，诞下麟儿张无忌，与义父金毛狮王﹝石坚﹞逃避武林中人追杀，隐居于冰火岛。其后，张家重回中土，却掀起了一幕幕惊人的武林恩怨，结果张五侠夫妇自杀，留下无忌，为师父所收养。无忌﹝郑少秋﹞长大后，因缘巧合练得一身绝学，成为明教教主，领导明教对抗蒙古人，后更与蒙古大汗的女儿赵明﹝汪明荃﹞相爱﹒另一方而又与旧侣芷若重遇，引出了感人肺腑的儿女情长………椿明和卜部美琴这两个刚开始交往的高中生，对椿来说，卜部是个充满谜团的女孩，而这谜团也正待他去揭开……