Multiple Choice
Cellular telephony uses ________.
A) an omnidirectional antenna
B) a dish antenna
C) Both A and B
D) Neither A nor B
Correct Answer:

Verified
Correct Answer:
Verified
Q19: WLANs normally use _.<br>A)licensed bands<br>B)unlicensed bands
Q41: In 802.11,channel bandwidth usually is _.<br>A)20 GHz<br>B)40
Q42: If a radio transmission is easily blocked
Q44: (From the box,"Controlling 802.11 Transmission")CSMA-CA+ACK usually is
Q45: The terms channel and service band mean
Q48: Which unlicensed band provides greater propagation distance
Q49: Attenuation with distance is faster with _.<br>A)UTP
Q51: 802.11ad will _.<br>A)operate in the 60 GHz
Q95: Signals usually _.<br>A)travel at a single frequency<br>B)spread
Q97: Interference is minimized in _.<br>A)licensed bands<br>B)unlicensed bands