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Don't rely solely on internal defense mechanismsFirst of all, there is a select selection box on the page, then there is an input box for the input purchase quantity, and there are also two display areas, namely, the display area for the selected color and the input quantity, and the next button operation.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.In the months before the 2016 election, the Democratic National Committee was hacked. Documents were leaked and fake news spread wildly on social media. In short, hackers launched systematic attacks on American democracy.在20 世纪60 年代，血液学家卢法·伊萨米尔博士不情不愿地成了解决超常事件的专家。Identity: Drama Director and Poet "Time"