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The SYN-Flood attack is currently the most common DDoS attack on the network, It is also the most classic denial of service attack. It takes advantage of a defect in the implementation of TCP protocol. By sending a large number of attack messages with forged source addresses to the ports where the network service is located, it may cause the half-open connection queue in the target server to be full, thus preventing other legitimate users from accessing. This kind of attack was discovered as early as 1996, but it still shows great vitality. Many operating systems, even firewalls and routers, cannot effectively defend against this kind of attack, and it is very difficult to trace it because it can easily forge the source address. Its packet characteristics are usually that the source sends a large number of SYN packets and lacks the last handshake ACK reply of the three handshakes.Console.log (application. A); //aa该剧以唐朝武则天时代为背景，对狄仁杰经典故事进行重新演绎和改编，讲述了狄仁杰在大唐名侦探大赛上崭露头角，却不料第一名被人抢走。紧接着又被渴望与他结伙办案的白元芳纠缠。机缘巧合下，两人组成“狄白”组合，专破奇案怪案以赚钱糊口。然而，正当他们逐渐走上正轨时，狄仁杰却发现一个巨大的阴谋缠上了自己。你们忙你们的吧，我就是来看看。　　本片是松居大悟完全原创的爱情电影。摇滚乐队クリープハイプ的主唱尾崎世界观的新作曲目灵感来自于吉姆·贾木许导演的《地球之夜》。而松居大悟听到这个背景后，也触发灵感，完成了这部作品。The above picture shows the interface for subway ticket purchase from Monday to Friday working days.