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DDoS Attack and Defense: From Principle to Practice (Ⅱ)张杨默然无语，不知怎么说才好。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.大龄女青年江一凡嫁给了技术男王宇明，父亲江闵宽和姐姐江一琳终于放下心来。王宇明事业受阻，决定自己创业，谁知困难重重，两人生活步入困境。江一凡在体检中发现乳腺有问题，却因不能确定王宇明是否会不离不弃而不敢告诉王宇明，决定一个人承担压力与痛苦。同时，王宇明前女友晓菡受伤住院，身边无人照顾，王宇明主动承担看护工作，这举动让江一凡与王宇明的情感雪上加霜。江一凡想提出离婚，却发现离婚后只会困境更大，决定回到婚姻中自我拯救。随着江一凡与王宇明两人间的误会的慢慢解除，王宇明的重情重义让江一凡重新触碰到婚姻的温暖。“没有完美的开始，只有完美的坚持”，江一凡信守这一婚姻理念，成功将自己和王宇明这两只婚姻菜鸟的“半熟婚姻”走向了温暖明亮的未来。Telecommunications反观，若是心机婊，那只能说套路太深演得太真，那杨长帆也服，至少你演倒我了