城市区域网 meaning in Chinese

metropolitan area network

Local and metropolitan area networks ; overview and architecture
局域网和城市区域网.综述及分级结构
Information technology - telecommunications and information exchange between systems - local and metropolitan area networks - specific requirements - part 2 : logical link control
信息技术.系统间的通信和信息交换.局域网和城市区域网.特殊要求.第二部分:逻辑链路控制