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The main reason why DDOS attacks are difficult to defend is that there are too many vulnerabilities and attack methods that can be exploited. In the OSI seven-layer network model used in the network data transmission process, basically each layer has protocols that can be exploited by DDOS attacks. According to the different network levels of the protocols used for DDOS attacks, this paper summarizes the currently known DDOS attack types and their defense measures as shown in Table 1-3. For more detailed information on current DDOS attack and defense, please refer to Huawei DDOS attack and defense summary post.敬文娘暂时收了高兴的心情，立时发见儿子一脸倦色。Before that, I read a lot of related articles, and after I have an overall understanding, I will begin to experience it. Before you start work, you should make clear what the event distribution mechanism is to study: the transfer rules of event sequences between ViewGroup/View.They often quarrel, I can't care about one thing and lose another, otherwise I will suffer. Especially during the New Year, it was the end of my world.众人想象中的五岳剑派和日月神教轰轰烈烈的正邪大战，并没有出现。祝千双的中学时代，当时还是个胖子的她喜欢上了学校高高在上的男同学乔野却不敢表白，只能痛下决心减肥。在尝试了节食，吃减肥药，催吐等各种各样的减肥方法后，祝千双不仅没瘦反而遭受到了周围人的排挤和奚落。祝千双坚持了很久的努力被打回了原形，这段暗恋也无疾而终。毕业后的两人各奔东西，仿佛从未有过任何交集，但她不知道的是，她所经历过的欢呼雀跃，低落伤心也同样在乔野的身上发生过，但两人由于种种原因都没有把自己的情感说出口。两个教会彼此勇敢的人就这样遗憾错过，消失在对方的青春里···梦不落雨林-张艺兴