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强身卫国之术。Normal项羽问道道：不知范老先生今夜观星，可有什么收获？范增遥指星空说道：你看，西北天场的那颗硕大的星辰，黯淡无光。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.白天也好，晚上也好，他出来一是为了找食物，再就是为了历练。Weapons captured at the scene李小远博士毕业信心百倍到全球顶尖科学孵化器企业乌托邦办公室应聘，被保洁员黄子元和潘多拉戏弄，狼狈不堪。公关专家林墨因全球爆发手机病毒来到乌托邦办公室求助，遭遇李小远，出手解围。林墨与乌托邦办公室CEO秦然、COO苏格等人原是旧时同学，后因种种事件断绝往来。秦然拒绝帮助解决手机病毒问题，林墨无奈离开。苏格试图说服两人重修旧好，百般撮合，秦然终于让步。林墨与秦然终于达成合作条件，林墨担任乌托邦公关顾问，秦然让乌托邦解决手机病毒问题，不过秦然又提出附加条件：由生手李小远出面解决，如能顺利解决病毒问题，他就可以加盟乌托邦。于是一场脑力和勇气的限时竞赛立刻开始……