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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.父母再婚对象的孩子，居然是刚刚分手的前任？！此剧被称为TVB版《蜗居》。Female workers during pregnancy and lactation also have the right to refuse to engage in operations where the concentration of toxic substances exceeds the national occupational health standards. (Original title: The state clearly stipulates that women will have half a day off on March 8 every year, but you don't know about these things yet...)郦食其与齐王和谈，元帅并不知道，既然如此，我们还是照常出兵就是了。《妈妈圈的流言蜚语》:向未来，容色端丽、气质优雅，是人人称羡的家庭主妇。丈夫出轨后曾有严重的暴力倾向。向未来痛定思痛，带着儿子双桨离开伤心地，搬到新家，母子俩怀着美好的希望，开始崭新的生活，也迎来了双桨小升初的关键时刻。 随着双桨转到了新学校——实验小学，向未来因此结识了四个性格各异背景不同的年轻妈妈，并被她们热情相邀加入了妈妈圈。然而妈妈圈并不太平，一波未平一波又起，一系列事件让各位妈妈们焦头烂额:“小升初保送名额”“更衣室事件”“亲弟弟假丈夫”等事件让向未来苦不堪言，过去的隐私一再被挖掘和放大，不断受到流言蜚语的恶意中伤；“炫富妈妈”田丽娟爱嚼舌根，为流言蜚语的妈妈圈平添了一把上火的油，“翡翠耳环”“情书”等事件的发生将她富婆隐私生活暴露无疑，而其本身自鸣得意、高高在上的性格一再遭到丈夫成功的疏远，婚姻危在旦夕；农村妈妈潘枝花，朴素、乐观，带着女儿背井离乡在城市打拼，...Usually, death is often unpredictable and difficult to identify accurately, which is also a medical problem.