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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.她说得十分生动，并不光是捡鸭蛋练轻功的艰辛：夕阳西下的时候，金辉洒遍果林，牛羊悠闲地在山下啃草，鸭子在沼泽地里乱窜……掉进沼泽地时，她不说吓得面无人色，却说情急求生，想抓住身边鸭子借力。“星际迷航”系列将推出新剧《星际迷航：奇异新世界》(Star Trek: Strange New Worlds)，主角为Christopher Pike、Spock、Number One，这三人组的“发现号”衍生剧真的来了。「东京爱丽丝」讲述租在一起生活的同级生4人的故事。4个人分别是工资基本用在逛街败家，感情世界还有现实距离的主人公・有栖川枫（山本），初出茅庐的漫画家・羽田水穗（トリンドル玲奈）、在銀座画廊工作的大小姐・円城寺小百合（朝比奈彩）和酷酷的心療内科医生・桜川理央（高橋メアリージュン） 。主题歌为chay的「恋はアバンチュール」。专门为韩国富豪家千金和少爷们设立的私立财团高中——神话学院，是一所超级白金学院，而被称为F4的四大家族继承人具俊表、尹智厚、苏易正、宋宇彬更是神话学院的象征。一天，平民出身的金丝草意外地闯入了只属于上流社会的神话学院，F4之首的具俊彪被这个跟上流社会格格不入、乐观开朗、顽强倔强的女孩所吸引。一段现代灰姑娘与王子的浪漫爱情故事由此展开。想一想就让人激动不已。《不信你不笑》作为网络系列爆笑剧，有灵活的场景和固定的时长，家庭幽默录像式的小情节短剧，无固定演员固定角色具有鲜明的网络特点，每集均有至少一个笑点，时长均不超过一分钟，由四到五个情节组成，其目的就是让观众用最短的时间和通过最方便的移动互联网平台，解压，放松，快乐。节目拍摄上采用的是高清实景拍摄，力求每一集的笑点都能淋漓尽致的表现出来，有一种很强的屌丝文化气息。