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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.If you are satisfied, please adopt it.A strange hunt that has never been seen before or since.方夫人诧异道：老爷既这么看重他家，何不直接托媒人上门？我们家虽然不算显贵，也配得起他们了。1900年，一场不对等的战争给当时的国家和人民带来了空前的灾难。那些自诩为文明之国的西方列强趁火打劫，妄图吞霸中国，在他们眼中彼时的中华民族不堪一击，野蛮又虚弱。五十年后，侵略者卷土重来，在鸭绿江的对岸、在海峡的中央，肆无忌惮地嘲笑、窥视。而这一次挡住他们的，正是昔日眼中“野蛮又虚弱”的中华民族。