CAJ | 학술논문

以Internet为代表的互联网在逻辑上是由若干不同的自治系统（Autonomous System，AS）构成。找到关键的自治系统的地理位置，并对其分布情况进行科学分析，对评估网络安全性和抗毁性研究等具有重要意义。文章通过基于介数的关键AS识别方法和基于连接关系数据的互联网交换点（Internet Exchange Point，IXP）识别方法，对互联网路由控制平面和拓扑物理层的数据进行分析，识别出较为关键的AS，以及关键AS之间的IXP。其地理分布结果显示，互联网中关键AS和关键IXP符合幂律分布，即极少数地区成为了影响整个互联网安全和稳定的关键地区。
이Internet위대표적호련망재라집상시유약간불동적자치계통（Autonomous System，AS）구성。조도관건적자치계통적지리위치，병대기분포정황진행과학분석，대평고망락안전성화항훼성연구등구유중요의의。문장통과기우개수적관건AS식별방법화기우련접관계수거적호련망교환점（Internet Exchange Point，IXP）식별방법，대호련망로유공제평면화탁복물리층적수거진행분석，식별출교위관건적AS，이급관건AS지간적IXP。기지리분포결과현시，호련망중관건AS화관건IXP부합멱률분포，즉겁소수지구성위료영향정개호련망안전화은정적관건지구。
The Internet is logical y composed of several dif erent autonomous systems (AS). It is important to find the critical autonomous systems and analyze their geographical distributions for assessing the security and survivability of the network. According to the method of key AS identification based on betweenness centrality and the method of IXP identification based on the connecting data of the Internet, this paper identifies the most critical ASes and the IXPs between them by analyzing the Internet routing control plane and the physical topology data. The results show that the most critical ASes and IXPs between them fol ow the power-law distribution geographical y, which means that a very few areas become the key areas af ecting the security and stability of the entire Internet.