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毫无疑问，ＩＰ网络技术推动了Ｉｎｔｅｒｎｅｔ在全球范 围的迅猛发展。随着全球Ｉｎｔｅｒｎｅｔ用户数量和Ｗｅｂ站点数量的急剧增长，带宽的需求也急剧增长，每半年主要ＩＳＰ的Ｉｎｔｅｒｎｅｔ骨干链路的带宽增长一倍。骨干链路速率已从ＯＣ ３提升到ＯＣ１２或ＯＣ４８?
Undoubtedly, IP network technology has promoted the global rapid development of Internet. With the dramatic increase in the number of Internet users and the number of Web sites worldwide, the demand for bandwidth has also risen sharply, doubling the bandwidth of Internet backbone links of major ISPs every six months. Backbone link rate has risen from OC 3 to OC12 or OC48?