WiMax stands for _______.
A. Wide-area Access for Maximum Reach
B. Wide-area Range to Maximize Access
C. Worldwide Interoperability for Microwave Access
D. Worldwide Access to Maximize Interoperability
查看答案
Microwave communication uses high-frequency _______.
A. radio waves
B. infrared
C. satellite communications
D. optic fibers
_______ is a term relating to sending data to a satellite.
A. Uplink
B. Upload
C. Download
Downlink
The GPS device in an automobile uses which communication channel?
A. Infrared
B. Radio Frequency (RF)
C. Microwave
D. Satellite
A service that uses existing phone lines to provide high-speed connections is called _______.
A. WWAN
B. 3G/4G
C. Voiceband
DSL
微信支付 
支付宝支付