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随着数据通信的不断发展，用户及电信业越来越需要标准化的协议和技术。本文就数据网环境的发展，Ｘ．２５和帧中继的市场趋向及宽带技术等几方面进行了探析。
As data communications continue to evolve, users and the telecommunications industry increasingly need standardized protocols and technologies. This article on the development of data network environment, X. 25 and frame relay market trends and broadband technology and other aspects were explored.