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.旺仔与小伙伴们通过生活中经常遇到的小问题,教小朋友们学知识,含动物篇、植物篇、天文篇、人体篇、化学篇、物理篇。This chapter is the last lecture on design patterns. It will talk about the third design pattern-behavioral pattern, with a total of 11 types: policy pattern, template method pattern, observer pattern, iterative sub-pattern, responsibility chain pattern, command pattern, memo pattern, state pattern, visitor pattern, intermediary pattern and interpreter pattern. I have been writing about design patterns for a long time. At last it's halfway through, Writing a blog post is a very time-consuming thing, Because I have to be responsible for the readers, Whether it's graphs, codes, or representations, Everyone hopes to write it as clearly as possible so that readers can understand it. I think both I and the readers hope to see high-quality blog posts come out. Starting from myself, I will stick to it and update it continuously. The continuous motivation comes from the continuous support of readers and friends. I will do my best to write every article well! I hope everyone can give opinions and suggestions continuously and jointly create a perfect blog post!女编剧汪明明接下一出边写边拍的偶像剧,暗中通过师傅推荐,让已经过气的男员伊森当上了男主角。伊森刻意接近明明。扰乱了明明的生活,而明明的师傅去杭州发展迟迟未回,明明只得硬着头皮接手整出戏。伊森很清楚自己此刻是利用明明,为了保住自己的男一号地位,可是和她在一起,某些片刻,他甚至以为自己真的爱上明明了。为了转移注意力,他刻意讨好女主角沈沛妮。伊森红了,他不再靠明明的庇护了,但在伊森还没做出决定前,明明却敏感的发现伊森变了,提出分手的人是明明,她甚至无力继续剧本工作。这段爱情,至此仿佛已经划下了句点。但真的结束了吗?跨过30岁的汪明明,在这段从天而降的恋情中有了自信——最终她找到了自己的幸福。"Recommended"? Sharing an Internal Growth Case1921年,宁波。美丽善良的吴翠萍因丈夫友良败尽家产,被迫离乡工作。友良病逝,将三个孩子若芸、伟强、孝仁寄养在弟弟友诚家。若芸因不堪婶婶金莲的欺凌,带两个弟弟千里寻母。一家团聚不久,幼子孝仁却不幸病逝,悲痛不已的翠萍发誓不再与孩子们分离。但生命的风雨未停歇,翠萍因金莲陷害而入狱,一家人再度分离。15年后,出狱的翠萍回到家乡,四处寻找儿女的下落。但此时,她的大女儿若芸已成为商界女强人,并一直酝酿着向叔叔一家的复仇计划;儿子伟强受伤失忆,认仇人天霸为父,步入江湖,与亲姐姐若芸相见不相识、针锋相对。面对即将成为教授夫人的若芸,翠萍隐瞒身份在若芸家帮佣,默默守护女儿。面对误入歧途的儿子,翠萍力劝伟强离开天霸,誓将他拉入正途。最终,亲情化解了仇恨,母爱换回了良知,历经波折的一家人终于团聚。属喜剧类的《IT狗》有20集,由简君晋执导,罗耀辉和林淑贤监制,演员阵容有凌文龙,陈汉纳,杨乐文(Lokman)@MIRROR,岑珈其,彭秀慧,邱士缙(Stanley)@MIRROR,陈湛文和余逸思等,剧情讲述香港一班IT人的故事,阿信(凌文龙饰)本是一家银行IT部的小主管,后被公司解雇,女朋友亦离他而去。双失的他仍乐观地坚守自己的创业梦。他在刚开业的共享办公室「BornHub」租了一张小小的办公桌,希望把「宴会人情APP」这个意念实现。「BornHub」是由一群IT界另类精英开发的共享工作空间,当中可谓人材济济。阿信以为找到一班志同道合,愿意和他一起拼搏的神队友,殊不知所有人都不是善男信女,而是一班非正常人类的「IT狗」。阿信的「宴会人情APP」和这群IT狗,一起经历了比赛,批评等经历,故事介绍这是「一个负能量的热血残酷励志丧笑喜剧」。