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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.虽然特征和目的都不清楚，但是工作得很不自然，料理和洗衣服都很恐怖，非常完美。　　地震夺走了佑宁父母的生命，使二妹佑杰变成了一名高位截瘫病人，还给她留下了一个在地震废墟上出生的小妹，十三岁的佑宁，一夜之间变成了这个由五个孤儿组成的家庭的家长。《宝乐婶的烦心事》是一部表现东北农村生活的轻喜剧。该剧讲述的是一位农村妇女为全家过上幸福生活经商创业，却历经磨难，遇上种种烦心事，在她坚强的努力下最终都化成桩桩喜事……金兵侵宋, 身负重伤的宋国将军嘱其女孟红, 爱徒王天龙及范天虎务必把两枚玉玺送到宋室康王手上, 匡扶宋室. 金国走狗完颜鹤利用江湖中人夺取玉玺以免康王即位, 不断向孟、王及范三人软硬兼施, 最终三人不惜与完掌握的 "风云堂" 决一死战!一场夺命火灾，三对爱恨交织的恋人，两场精心谋划的复分，一个缠绵悱恻的爱情结局。间，对许大力的爱变成了恨，他发誓要为父母复仇…… 　　李海天接手了许大力的怡然集团，数年后和合作企业韩国崔氏企业董事长的女儿崔英姬结了婚，事业蒸蒸日上，生活安然如意，然而，一个叫阳光的女孩走进了他的生活，特有的魅力，使李海天感觉到阳光莫名的吸引力…… 　　阳光顺利进入了怡然集团，崔英姬的弟弟尹浩东觉得阳光被重用不可思议，他派人去调查，却得到一个意外的信息：李海天就是那场火灾的纵火者…… 　　崔氏企业停止了合作，怡然集团损失惨重，李海天的财务步步陷入困境，众叛亲离中，只有李海天自己清楚：自己不是纵火犯！。顶住离婚、破产等重重压力，在不懈努力下，李海天终于发现了一个隐匿多年的惊人秘密……该剧讲述走马上任的江南县委书记严东雷带领班子成员，坚持人民利益至上的群众观，在优化发展环境、加强党的基层组织建设、开展效能革命、推进生态文明建设等一系列工作中的故事。