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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.Return string.length;Dr. Anders EricksonBBC最新青春喜剧，改编自同名电影，讲述两个好基友调皮捣蛋的故事，青春中二基情满满，已续订第二季。九十年代末的中原内陆某小城，有一所封闭的武术学校。有一群少年在这所学校接受功夫训练和文化教育。 一天，有一位新的语文老师来到这里，开启了一段不寻常的经历……只是他的留言一发出，立刻就被众多网友的无数留言淹没了。一九四二年春天，日军发动了对我晋绥抗日根据地的疯狂“扫荡”，八路军为了集中兵力反击“扫荡”，主动撤离吕梁山区。吕梁人民的抗日斗争进入了最艰难的时期……康家寨，一个坐落于吕梁山中的村庄。八路军撤离之后，村里的形势变得动荡不安，捉摸不定。老财主康锡雪庆幸反攻倒算的时机已到，密谋夺回在减租减息斗争中失去的钱粮，妄图重树自己在村里的权势。农会干部康顺风见风使舵，甘为康锡雪出力跑腿。年轻的共产党员、农会干部雷石柱带领党员康明理和孟二愣挺身而出，决意揭穿康锡雪的阴谋……