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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.改编自押见修造的同名漫画原著《恶之华》。导演是曾执导《接招吧！那边的女孩》等漫改作品的井口升，编剧则是曾编写《我们仍未知道那天所看见的花的名字》等许多人气动画剧本的冈田磨里。不过呢，我也明白，你和玉姐姐情深意重，听闻你们过往的事情，感动的都掉眼泪了。　　本片根据赵乾乾同名小说改编。两人演的影剧都不少，也笑称最近“刚把手头的账还清”，但表示“最终还是会变成全心全意做Stolen Picture”。该剧以医院精神科为背景，讲述两位性格迥异的主人公陷入爱河而展开的浪漫爱情故事。赵寅成在剧中扮演拥有完美外貌和极好口才，且十分浪漫的人气推理小说家张宰烈。孔孝真则扮演外表虽然很洒脱，但是比任何人都感性的精神科医生池海秀。他们在相遇后，生活发生了翻天覆地的变化。