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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.此外，Final Season-浅梦之晓预计将于2021年末播出！A. Flight qualification;那么越国到底是什么办到的呢？张良再仔细询问了几个细节之后，已经相信确有其事。塔莉莎·坎贝尔（Talitha Campbell）是一位富有企业家傲慢的女儿，在一位单身母亲的勤劳女儿汉娜·埃利斯（Hannah Ellis）失踪后被捕。徐文长果然也是有大运势的人。