摘要
城域网是与局域网和广域网相对应的计算机网络的概念,数据通信和电信技术的发展赋予城域网新的内涵,将城域网的概念延伸到整个通信网络,泛指在城市及其郊区范围内提供多种业务的所有网络。城域网覆盖大约2公里到150公里的范围,是城市中作为局域网互连的高速网络,它以宽带光传输为开放平台。各个城市的城域网最终将透过更大范围的广域网络骨干相互衔接,最终形成一个全国或全世界规模的无所不在的网络。
Metropolitan Area Network (MAN) is a concept in constrast with Local Area Network (LAN) and Wide Area Network (WAN). The development of data communication and telecommunication technologies have endowed MAN with fresh connotations and extended the concept of MAN to whole telecom network that is generally referring to all the networks providing multi-services in urban area and suburb. The geographic coverage of MANranges from about 2km to 150km,