目前,四种主要宽带技术较为流行,它们分别是DSL、光缆、卫星和陆基无线技术。大城市里的用户将使用光缆收发大量的数据,人口密度相对低一些的地区的用户将依靠DSL技术,而在偏远地区和欠发达地区的人们只能通过卫星接收数据。无线技术不仅能够以移动的方式提供快速的数据信息服务,而且能够使人们 Currently, four major broadband technologies are more popular: DSL, fiber optic cable, satellite and land-based wireless technologies. Users in big cities will use fiber optic cables to send and receive large amounts of data, and users in areas with relatively low population densities will rely on DSL technology, while people in remote and underdeveloped areas receive data only via satellite. Not only can wireless technologies provide fast data and information services on the move, but they also enable people