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Atfer ();Industry 4.0 proposed by Germany has three major themes: first, intelligent factories, focusing on intelligent production systems and processes, and the realization of networked distributed production facilities; The second is intelligent production, which mainly involves the production logistics management of the whole enterprise, human-computer interaction and the application of 3D technology in the industrial production process. The third is intelligent logistics, which integrates logistics resources mainly through the Internet, the Internet of Things and the Internet of Services to give full play to the efficiency of existing logistics resources.At present, there are many open source DDOS attack tools (low attack cost is also one of the reasons why DDOS attacks are easy to occur), but there are not many DDOS attack defense tools. Fastnetmon is an efficient analysis tool for DDOS attacks based on various packet grabbing engines, which can detect and analyze abnormal traffic conditions in the network and notify or block attacks through external scripts. A visual DDOS security early warning system can be built by integrating InfluxDB and Grafana.胡镇这时才从惊吓中清醒过来，不禁腿脚发软。有一天，偶然认识的穗村伸（栁俊太郎）强行邀请我参加电视购物节目的主持人。穗村是经营电视购物节目的公司制作本部长。5-second rule: After holding the ball, the player must throw the foul ball within 5 seconds, and FIBA rule stipulates that the free throw must also be shot within 5 seconds. 　　Event Handler: It consists of multiple callback methods, which constitute an application-related feedback mechanism for an event. There is no event handler mechanism in the Java NIO field for us to call or make callbacks, but we write our own code. Netty has made an upgrade in the role of event handler compared with Java NIO. It provides us developers with a large number of callback methods for us to implement corresponding callback methods for business logic processing when specific events are generated, namely ChannelHandler. The methods in ChannelHandler correspond to callbacks to each event.