QUESTION 5 In a Wi-Fi LAN, wireless hosts generally send frames directly to one
ID: 3755880 • Letter: Q
Question
QUESTION 5
In a Wi-Fi LAN, wireless hosts generally send frames directly to one another.
True
False
0.75 points
QUESTION 6
In ________, when a wireless host wishes to send, it first sends a message to the wireless access point asking for permission to send. When the access point sends back a response, the host sending the original message may transmit. All other hosts must wait.
CSMA/CA+ACK
CSMA/CD
RTS/CTS
CSMA/CA
0.75 points
QUESTION 7
What propagation problem becomes worse when there is a large, and dense, object between sender and receiver?
multipath interference
shadow zones (dead zones)
inverse square law attenuation
None of these
0.75 points
QUESTION 8
When does it make sense to use RTS/CTS?
when all devices can hear each other
when not all of the devices can hear each other
when efficiency is crucial
always
0.75 points
QUESTION 9
Wireless radio transmission speed is usually measured in terms of ________.
frequency
wavelength
amplitude
dollars
0.75 points
QUESTION 10
If you triple channel bandwidth, what happens to the number of channels in a service band?
It is reduced a third.
It triples.
It is reduced a ninth.
It increases by a factor of nine.
CSMA/CA+ACK
CSMA/CD
RTS/CTS
CSMA/CA
Explanation / Answer
5.
In a Wi-Fi LAN, wireless hosts generally send frames directly to one another.
False
6.
In RTS/CTS when a wireless host wishes to send, it first sends a message to the wireless access point asking for permission to send. When the access point sends back a response, the host sending the original message may transmit. All other hosts must wait.
Option 3
7.
shadow zones(dead zones) propagation problem becomes worse when there is a large, and dense, object between sender and receiver.
Option 2
8.
when not all of the devices can hear each other it make sense to use RTS/CTS.
Option 2
9.
Wireless radio transmission speed is usually measured in terms of frequency.
Option 2
10.
If you triple channel bandwidth, reduced a third to the number of channels in a service band.
Option 1
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