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On the one hand, the core components of the network infrastructure have never changed in the past ten years, which makes some discovered and exploited vulnerabilities and some mature attack tools have a long life cycle and are still valid even today. On the other hand, the rapid development of the application of the Internet seven-layer model has diversified the attack targets of DDoS. From the web to DNS, from the three-layer network to the seven-layer application, from the protocol stack to the application App, the endless new products have also given hackers more opportunities and breakthrough points. Moreover, DDoS protection is a project with unequal technology and cost. Often, the construction cost of a business's DDoS defense system is larger than the cost or benefit of the business itself, which makes many start-up companies or small Internet companies unwilling to make more investment.The general code is like this, and I feel that the code using the intermediary mode is similar, so I won't introduce it much here. The code in the book has advantages, but I don't feel that there is much difference, so I no longer use the intermediary mode to write code here. State mode is an unusually excellent mode, which may be the best way to solve some requirement scenarios. Although the state mode is not a simple to clear mode (it often brings about an increase in the amount of code), once you understand the essence of the state mode, you will certainly thank it for its incomparable benefits in the future. The key to the state mode is to distinguish the internal state of things. Changes in the internal state of things often bring about changes in the behavior of things. This article describes the state mode in detail该剧讲述的是给秘密操纵韩国的少数权势家族以致命打击的小偷们的故事。池贤宇在剧中饰演兼具颜值和多项才能的小偷张石木，徐珠贤则饰演热血侦查官姜孝珠，是一个充满了正义感的人物，将展现出不惜一切抓获犯人和保护弱势群体的果断、温暖一面 。　　在一次行动中，由于两人错杀了另一势力的成员，对方杀害了民在作为报复。极度悲愤的载文发誓要为民在报仇，但是组织断定二人失误在先，应该顾全大局不再追究为好。对于刘邦而言，死的只是一个嫡子，还有其他的儿子在，比如那个私生子刘肥。玉米见两个哥哥都没难住大姐夫，眼珠一转，走上前，背着手儿仰头问道：请问敬文哥，怎样才能日进斗金？众人轰然大笑起来。