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DDOS attacks mainly occur in the network layer. Its most obvious characteristic is to send a large number of attack packets, consume network bandwidth resources and affect normal users' access. At present, the detection and defense technology for DDOS attacks in the network layer is quite mature, and at the same time, some new attack methods-DDOS attacks in the application layer have emerged. Different from network layer DDOS attacks, application layer DDOS attacks mostly imitate the access behavior of legitimate users and will not generate a large number of attack data packets during data transmission, but they will consume server resources through a large number of database queries and other operations, which is more difficult to detect. According to the different attack modes, DDOS attacks include reflection amplification attacks in addition to ordinary flooding attacks. This type of attack often uses a legitimate server as a reflector, which sends a large number of data packets to the target, thus causing greater harm. At present, DDOS attacks against DNS servers are also common. Attackers often send fake domain names to DNS servers, consuming DNS server resources. At the same time, due to the recursive query mechanism in DNS servers, DDOS attacks against DNS servers have a large impact range.Each player has 4 chances to be allowed to foul, and the fifth time he leaves the game (6 times in NBA). And cannot play again in the same match. A free throw is a shot when no one can stop or defend it. It is a punishment for the foul team and gives the other team a chance. The free throw should stand behind the free throw line and shoot within 10 seconds after taking the ball from the referee. After shooting, the ball cannot step over the free throw line before touching the basket. 　　该剧讲述了在中华民族危难之际，中国最优秀的一群先进分子找到了马克思主义救中国的真理，选择了信仰共产主义思想，共同建立了中国共产党，历经艰难险阻、锐意进取、不断发展壮大的伟大历程。故事以毛泽东为主的“一大代表”为线索人物，从1919年之后中国社会主要矛盾出发，以党的发展脉络为根基，展现了革命先辈们在党面临危急关头，在民族遭受危难时刻，挺身而出、力挽狂澜，通过他们不屈不挠和艰苦奋斗，开辟了一条前所未有的革命道路，最终取得了伟大的胜利。If the require parameter does not begin with "/", "https://blog.csdn.net/arsaycode/article/details/", "https://blog.csdn.net/arsaycode/article/" and the module is not the core module, then the module will be loaded by looking for node_modules. This is usually the way the packages we get from the npm we use are loaded.抗日战争爆发的上海是冒险家的乐园，各国间谍云集，各党派都在上海秘密设立了情报中心，极力拉拢热血青年加入，使得许多年少不经事的青年人误入歧途。热血青年钟晓霞在一个偶然的机会，被一个名叫醒狮社的间谍组织吸收，经过几年血雨腥风的拼杀磨练，她成为了一名身手了得的特工。醒狮社对内声称是国民党军统的一个分支机构，其实它是上海黑帮与外国势力合办的一个秘密间谍组织，他们充当杀手、倒卖军火、贩卖毒品、走私文物，是一伙唯利是图，大发国难财的亡命之徒。钟晓霞由于向未婚夫--法国人雷诺，坦白了自己的特工身份，使雷诺被组织灭口。为了给雷诺报仇，消灭醒狮社，她暗地里投奔了军统，成为军统和醒狮的双重间谍。但出乎钟晓霞的意料，她父亲钟庆义竟然是打入军统和醒狮社的地下党员；她已死去多年的母亲，高级特工金玉淑也奇迹般复活，现身上海……一家三口各为其主，生死对阵，剑拔弩张，相互卧底，矛盾、党派之争面前、夫与妻、母与女、情与爱的离奇故事。20名学生周六留校，期间突然响起辐射污染报警铃声——这座小镇附近有一座大型化工厂，因此学校经常会组织疏散演习。学生们认为这次也是例行演习，于是在篮球教练的带领下躲进学校的放射性尘埃躲避所。但这次不是演习……警报解除之后，众人回到校园，却发现巨大的爆炸已经彻底摧毁整座小镇，校园大门外已经没有任何生命迹象。更让人恐惧的是，那些没有待在掩体里的人似乎被放射性物质感染了……轻松幽默的家庭伦理剧《谁来伺候妈》作为《老牛家的战争》的姊妹篇，该剧由知名导演余淳先生执导，结合了时下最火的家庭婚姻生活话题，讲述林母和林家三兄弟的复杂家庭生活，关注赡养老人问题、遗产分割问题、离婚再婚等多种家庭生活中会面临的各种琐事。