c) Microwave, satellite, radio, and infrared.
d) Smart phones, satellite, television, and radio.
4) Which of the following statements about wireless devices is not true?
a) They are small enough to easily carry or wear.
b) They have sufficient computing power to perform productive tasks.
c) They have strong security feature that make them impossible to hack.
d) They can communicate wirelessly with the Internet and other devices.
5 GPS are supported by ___ satellites
a) LEO
b) MEO
c) GEO
6) Which of the following statements about Wi-Fi is not correct?
a) Wi-Fi provides simple Internet access.
b) Laptop PC scans contain chips that can send and receive Wi-Fi signals.
c) Many companies offer free Wi-Fi access in their stores.
d) Wi-Fi requires encryption for secure transmissions.