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According to Microsoft statistics, the upper limit of dynamic domain name queries that a DNS server can withstand is 9,000 requests per second. However, we know that tens of thousands of domain name resolution requests per second can be easily constructed on a P3 PC, which is enough to paralyze a DNS server with extremely high hardware configuration, thus showing the vulnerability of the DNS server. At present, the most commonly used DNS server software is the leading WINMYDNS in China and Bind abroad.The algorithm takes advantage of the retransmission characteristics of TCP/IP protocol. When the first syn packet from a certain source IP arrives, it is directly discarded and recorded in the state (quintuple). When the second syn packet from the source IP arrives, it is verified and then released.故事讲述未来30年后，仿真智能人在人类社会被广泛应用。人类为了自身安全，建立了东西方智能岛。一支由智能姬组成的神秘战队，为了维护人类安全和世界和平，一次次地打击异变智能人的犯罪行为和恐怖袭击。小戏骨《洪湖赤卫队》是以王玉珍主演的《洪湖赤卫队》为蓝本改编，讲述1930年湖北沔阳县委为配合红军行动，暂时把赤卫队撤离彭家墩。彭家墩恶霸彭霸天趁红军转移暂离洪湖之际卷土重来。洪湖赤卫队在乡党支部书记韩英和队长刘闯的带领下，与敌人展开了艰苦曲折的斗争。韩英不幸被捕入狱。面对敌人的威逼利诱，韩英始终坚贞不屈。赤卫队最终打回彭家墩，消灭了保安团和地方反动武装，红旗又在洪湖上迎风飘扬。车上，任杰脸上浮现丝丝怒气，说道：不过是恰巧写了几本人气不错的小说。Note:----> The following represents what the event target needs to do.毛拉（萨莎·亚历山大 Sasha Alexander 饰）是一名经验丰富的法医，比起待在鲜活热闹的活人世界，个性腼腆内向的她更乐意和她那些“尸体伙伴”们一同享受闲散的午后时光，就是这样一个常人眼中的“怪人”，毛拉和简竟然成为了一见如故的好友和搭档，她们一个“主外”，一个“安内”，联手破获了许多匪夷所思的案件，成为了行业内的美谈，与此同时，在职场之外，生活之中，亦有各种各样棘手的难题等待在前方。