The security situation of Internet is more and more severe.Aiming at this problem,this paper analyzes and compares the survivability of Internet topology structures in China and USA by taking the relative size of maximum connected sub-graph in residual network topology after the attack as metric.Based on the Internet topology data,it is concluded that,under both random strategy and deliberate strategy multi-point attacks,the survivability of Internet topology structure in USA is stronger than that in China.Especially in deliberate strategy multi-point attack,the mean survivability metric of USA Internet is 1.8 times as high as that of China Internet.%针对日趋紧张的互联网安全局势,以网络攻击发生后残余网络拓扑中最大连通子图的相对大小作为度量指标,分析比较了中美两国互联网拓扑结构的抗毁性.研究表明,就采用的互联网拓扑数据而言,无论是随机策略多点攻击,还是蓄意策略多点攻击,美国互联网的抗毁性都要强于中国互联网,特别是针对蓄意策略攻击,美国互联网抗毁性指标的均值是中国互联网的1.8倍.
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