在无线通信领域，现在主流应用的是第四代（4G）通信技术，其理论下载速率可达到 （ ） Mb/s（兆比特每秒）。
- A.2.6
- B.4
- C.20
- D.100
正确答案及解析
正确答案
解析
4G指的是第四代移动通信技术，包括TD-LTE和FDD-LTE两种制式，是集3G与WLAN于一体，并能够快速传输数据，以及高质量的音频、视频和图像等，理论下载速度达到100Mb/s，比通常家用宽带ADSL快25倍，并且可以在DSL和有线电视调制解调器没有覆盖的地方部署，并能够满足几乎所有用户对于无线服务的要求。
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