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The most basic defense at the network layer is RFC? 2827 [3]. Using input source filtering, ISP refuses to route a packet whose source IP address does not belong to its source subnet further. Input source filtering can effectively prevent SYN flooding attacks disguised as IP. However, this method is useless at present because it is difficult to deploy on a large scale. Moreover, input source filtering cannot resist distributed attacks.At present, what methods do we take to solve the attack? The first method shortens the waiting time and deletes the illegal request data packets waiting in the waiting queue as soon as possible. The second method is that the first handshake message is not put into the waiting queue. We return a 32-bit unsigned integer to the client as the Seq of the second handshake. The integer is obtained by adding a serial number of the server to the parameters requested by the user (including the requested address, port, etc.). If it is a normal user, it adds 1 as ACK after receiving this integer and returns it to the server. After receiving the data, the server subtracts 1 from this ACK and then performs inverse operation to obtain various parameters. Finally, the data sent out are compared. If they are completely consistent, it means that it is an effective response and stored in the corresponding data structure, otherwise it is not. Through this method, illegal requests cannot occupy system resources.该剧讲述了天神柏衍因意外扰乱人间姻缘被贬下凡历劫，从天而降撞上了媒馆老板娘上官雅，阴差阳错变成老板夫“楚烨”，两人就此携手牵红线坠爱河，开启一段拯救姻缘乱象的仙凡之恋。除了这对欢喜冤家一路撒糖外，还有风风火火的“媒学一家人”笑趣登场，从互怼打闹到互相依靠，他们在拯救姻缘乱象的路上暖心守护着彼此，奠定了轻甜之余不失温情的剧集基调。I think going to a horrible ghost movie can still suppress the shock.故事发生在202X年。日本被深深的闭塞感所包围，被世界打上了夕阳国的烙印。为了打破这种没有出口的局面，首相鹫田（柄本明饰）启动了一个项目。通过人工智能从全国选拔领导人，让他们承担起治理颓废城市的重任。年轻人不能担当政治的理由，一直被认为是“经验”少。人工智能拥有一个人根本无法得到的“经验”的庞大数据。也就是说，人工智能可以补充很多“经验”。 AI选择的首相是17岁的少年真木亚兰（神尾枫珠饰），年纪尚轻，但追求理想社会。其他成员也都是20岁左右的年轻人。真木和同伴一起运用AI推进改革，使濒临衰退的地方城市，作为实验城市重生。@哦撸马（阿点）在门客的建议和巨大利益的诱惑下，咸阳令阎乐向岳父赵高献计，杀二世立子婴。张无忌只得遗憾而归。