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Source authentication and resource isolation, that is, when the client and the server establish a reply, the source of the request is authenticated as necessary, and the authentication results are formed into a reliable white list or blacklist, thus ensuring the effectiveness of the server in processing services. If there are enough hackers and broilers and the authenticity of forged data packets is high, a better countermeasure effect can only be achieved by improving the processing speed and traffic throughput of the server.楚明是个报社的小编辑，自甘平庸，过着清心寡欲的平淡生活。一次意外改变了楚妻金晓燕的想法，在她的软硬兼施下，楚明走上了屏幕，成了一个小有名气的主持人。楚明出了名，也挣了钱，可是他和金晓燕的生活并没有如同期望的一样越变越好……舆论，让他们不堪重负；奸人的挑拨，使他们不断地陷入误解之中。一切都被“出名”搞得一团糟。在经过一番风雨后，夫妻俩深深的体会到出名的苦恼和不易，他们终有所悟，又重新走到了一起。胡镇也乖觉，拼死抵赖，便迟迟不得结果，加上两边请的讼师都在来湖州府的路上，于是知府大人就顺势将案子延宕下来。宗介与高卢决战之后，宗介继续担任千鸟的贴身保镖，可是他的性格无疑又为校园的安全和世界的和平蒙上了层层阴影，作为学生会副主席的千鸟当然不能袖手旁观，在宗介作出一些危险的事情之后，一场痛打是免不了的……Handle (Handle or Descriptor, referred to as Handle under Windows and Descriptor under Linux): Essentially represents a resource (such as file descriptor or socket descriptor for network programming) provided by the operating system; This resource is used to represent events one by one, which can come from both the outside and the inside. External events such as the client's connection request, the data sent by the client, etc.; Internal events such as timing events generated by the operating system. It is essentially a file descriptor, and Handle is the birthplace of events.B) Design principles. Many people have listed seven principles, such as single duty principle, opening and closing principle, Richter substitution principle, dependence inversion principle, interface isolation principle, composite reuse principle and Dimit principle. LSP, I elevated it to one of the three cornerstones of the object-oriented paradigm; Single responsibility and interface isolation are mainly used as the principle of responsibility division in object-oriented analysis/OOA, which you can not pay much attention to at this time. Relying on the inversion principle, I throw it away as garbage, because the opening and closing principle or directly "relying on abstract type principle" already contains the essence of relying on the inversion principle, while the dross of relying on the inversion principle is inherited by IoC. Of course, the pullback, I emphasize very much. Therefore, you need to master the abstract dependency principle (OCP), one-way dependency principle (including the learning of callbacks) and the minimum dependency principle (composite reuse principle, Dimit rule).1. Written examination: