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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.********今日三更，明日有事，只有晚上一更。锦言被强行嫁给王爷，拥有双世记忆的她，叱咤整个王府。与王爷从互相讨厌到坠入爱河，这一世，锦言与王爷的爱情更甜！《中国功夫》主要讲述了在我市一所普通武校的教练高健临危受命,教授一批到中国学习功夫的留学生，在上课的过程中，高健要面临东西方文化差异带来的各种冲突。在经历了一连串的打击、挫败之后，高健逐渐悟到了中华武术的真谛就是一个“和”字，即佛家所说的自在和放下。他终于克服了自身的性格缺陷和心理障碍，也重获了温暖的亲情和甜蜜的爱情。女主从小被叔叔和婶婶养大，视他们为亲父母，然而当女主留学回来后，却发现一个年轻男人（男主）登堂入室与婶婶发展婚外情，下半身瘫痪的叔叔毫无办法。那个男人究竟有什么阴谋，女主决定要阻止他...诸位，赵军就在三十里外的井陉口布置好了阵势在等我们，我们已经主动出击了，也自然就没有后退的道理。天才少年画家顾夜白创伤性心理疾病发作，眼里的世界失去了颜色。他正准备国际美术大赛金奖的画稿，变故令他十分焦虑。他偶遇阳光女孩路悠言，在她的帮助下慢慢调整心态，完成了自己的美术梦。可就在顾夜白和路悠言经历一段段磨炼，即将收获美丽爱情时，路悠言得上司赏识，获得了去巴黎的机会，而和她一样患病的表哥却传来了病危的消息，两人的爱情遭遇现实考验。除了爱情外，顾夜白、路悠言等这一群年轻人面临毕业的大四人生还有太多太多需要考虑的现实问题，社会充满了各种机遇，同时也有未知，年轻人们用青春的画笔书写着各自的心与灵魂。