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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.《玻璃假面》讲述的是一个杀人犯的女儿出生后，一直过着很窘迫的生活，但是即使这样也要很好的生存下去，并且还要复仇的故事。I think that for today's him, the topic of the details of the battle at position 142 can also be stopped. I comforted him and finished the interview after a few words.讲述了变成大人的瞬间的故事李敬文忙答应了，再对板栗和葫芦等人略一点头，便和李敬武头也不回地大步去了。《方谬神探》是刘德华投资拍摄的第一部电视剧，由演技派演员张卫健和袁咏仪主演。在剧中张卫健与袁咏仪扮演一对夫妻，搞笑与斗智的花招是全剧的精髓。