Cellular telephones use ________.
A) an omnidirectional antenna
B) a dish antenna
C) both A and B
D) neither A nor B
Correct Answer:
Verified
Q9: Wireless radio transmission usually is expressed in
Q10: Wireless network standards come from _.
A)OSI
B)TCP/IP
C)both A
Q13: If the signal strength at 20 meters
Q15: Wireless LAN standards are created by the
Q16: What propagation problem becomes worse as frequency
Q17: The other wireless device is far away
Q18: Frequency is measured in terms of _.
A)nanometers
B)hertz
C)both
Q19: The terms channel and service band mean
Q28: What propagation problem becomes worse as frequency
Q37: The frequency spectrum extends _.
A) into the
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