非对称数字用户线（ADSL）采用的多路复用技术是（）。
- A.FDM
- B.WDM
- C.TDM
- D.CDM
正确答案及解析
正确答案
解析
在本题中，非对称数字用户线（ADSL）采用的多路复用技术是频分多路复用技术，ADSL是一种非对称的DSL技术，所谓非对称是指用户线的上行速率与下行速率不同，上行速率低，下行速率高，特别适合传输多媒体信息业务，如视频点播（VOD）、多媒体信息检索和其他交互式业务。ADSL在一对铜线上支持上行速率512Kbps～1Mbps，下行速率1Mbps～8Mbps，有效传输距离在3～5公里范围以内。
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