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Suppose the attacker is in an "interconnected" network (e.g. An Autonomous system? System), whose ISP restricts the input and output filtering of the attacker's network traffic, will be able to prevent this spoofing attack-if this method can be deployed to the correct location by the organization. This defense method of traffic input and output filtering will restrict some legitimate communications, such as the mobile IP triangular routing operation mode, so it cannot be widely deployed. IP Security Protocol (IPsec) also provides an excellent way to resist spoofing packets, but this protocol cannot be used due to deployment restrictions. Since it is usually impossible for the server side to require the ISP of the link initiator to implement address filtering or require it to use IP security protocols, more complex solutions are needed to resist this spoofing attack disguised as multiple addresses, which will be discussed later.动画片《贝贝熊》是由俄罗斯制作的最新3D卡通动画，讲述的是两个不知疲倦的淘气包的故事。李宝英饰演尹智秀，她是独自抚养着孩子的坚强的单亲妈妈。她曾经是受人追捧的检察长家的千金，但因为事故失去家人，辛苦过着每一天。韩在贤和尹智秀相爱着，迎来了第一个花样年华。在对人生感到疲劳的中年以完全不同的境遇重逢，延续着爱情故事。该剧讲述了“励志三婚女”王小幸与“一手高富帅”丁学琪之间非同一般的婚恋故事。The above is only a model of "Long En" bicycle, If you need to generate other types of bicycles, Other subclasses can be written. The most important advantage of factory mode is that some of the same methods can be implemented. We can write code in the parent class for these same methods. If we need to implement specific business logic, we can rewrite the parent class's methods in the subclass to implement our own business logic. In terms of professional terms, there are two points: First, weaken the coupling between objects and prevent code duplication. Instantiating a class in a method eliminates repetitive code. Second: Repetitive code can be written in the parent class. Subclasses inherit all member attributes and methods of the parent class. Subclasses only focus on implementing their own business logic.此时此刻，众人也都明白过来。国内首部偶像剧化的现代都市情景喜剧《双人房单人床》将于10月23日在全国《630剧场》同步开播。与传统的家长里短式的情景喜剧不同的是，这部听起来跟莫文蔚的歌很类似的《双人房单人床》走的是偶像化的都市情景喜剧路线，这也是本剧的最大看点。这是在情景喜剧界向来勇于创新的630继综艺情景喜剧、古装情景喜剧之后力推的又一新兴剧种，能不能成为本土化情景剧和偶像剧的突破之作，还得等着市场的反应。