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Note: Blood River, as a tank, does not pursue output, as long as it holds the BOSS and ensures its survival rate.镇国公夫人点头道：这我当然知道。The main reason why DDOS attacks are difficult to defend is that there are too many vulnerabilities and attack methods that can be exploited. In the OSI seven-layer network model used in the network data transmission process, basically each layer has protocols that can be exploited by DDOS attacks. According to the different network levels of the protocols used for DDOS attacks, this paper summarizes the currently known DDOS attack types and their defense measures as shown in Table 1-3. For more detailed information on current DDOS attack and defense, please refer to Huawei DDOS attack and defense summary post.越王勾践元年（前496），吴王阖庐听说允常逝世，就举兵讨伐越国。越王勾践派遣敢死的勇士向吴军挑战，勇士们排成三行，冲入吴军阵地，大呼着自刎身亡。吴兵看得目瞪口呆，越军趁机袭击了吴军，在檇李大败吴军，射伤吴王阖庐。阖庐在弥留之际告诫儿子夫差说：“千万不能忘记越国。” 三年（前493），勾践听说吴王夫差日夜操练士兵，将报复越国一箭之仇，便打算先发制人，在吴未发兵前去攻打吴。范蠡进谏说：“不行，我听说兵器是凶器，攻战是背德，争先打是事情中最下等的。阴谋去做背德的事，喜爱使用凶器，亲身参与下等事，定会遭到天帝的反对，这样做绝对不利。”越王说：“我已经做出了决定。”于是举兵进军吴国。吴王听到消息后，动用全国精锐部队迎击越军，在夫椒大败越军。越王只聚拢起五千名残兵败将退守会稽。吴王乘胜追击包围了会稽。干柴燃起噼啪作响，这一堆篝火旁围坐的都是军方高级将领，项羽、范增、项庄、龙且、虞子期、陈平等人。飞杨的裙裾，动感的节奏，歌舞升平的背后正酝酿着一场血腥的风暴：一公司的老总突然被杀……