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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.复员军人艾澄川、李华立志改变家乡穷困面貌，回乡办企业、闯市场。他们历经艰辛、饱受磨砺。通过开始承接空调安装业务逐步发展到溴化锂中央空调的研制、生产，事业上获得成功，同时，爱情也结出了花蕾。李营才心系乡亲，辞官回乡当村支书，他带领群众办工厂，在一次次失败中，摸索积累经验，最终在汽车保险杠招标中夺标成功，从此开辟出一条脱贫致富--兴办乡镇企业的创业之路。Ottoman Empire: 1,000,000不如请了朋友来聚会，饮酒赏月观舞作诗如何？王突大喜道：此话当真？兄长舍得？王穷笑道：又不送人，怎不舍得？遂吩咐了他一番话，王突就乐呵呵地去安排了。　　枫林市，百草药业董事长石中流被绑，勒索信仍是夜枭。刑警跟踪石夫人，但赎金于洗浴中心被迅速悄悄取走。省城的常征判断出取钱方式，但为时已晚。The reason why the film is attractive is that I personally think it cannot be separated from the large number of comparisons in the film, the dramatic conflicts arising from these, and the main actors involved in the film are full of passion and love for life, no matter how this emotion is finally expressed.Name: Wang Zha