Question 5
Bluetooth RF characteristics can be best described as which of the following?
A. continuous transmitting 5-GHz range
B. continuous transmitting 2.4-GHz range
C. frequency hopping 5-GHz range
D. frequency hopping 2.4-GHz range
Answer: D
Question 6
Which best describes an Ad Hoc Network?
A. Basic Service Set
B. Extended Service Set
C. Independent Basic Service Set
D. Mesh Network
E. WiMAX Network
Answer: C
Question 7
When would rate shifting down by a client occur?
A. when the distance to the AP has increased and the missed-symbol rate has increased
B. when the distance to the AP has increased and the signal level has increased
C. when multipath has decreased and the missed-symbol rate has decreased
D. when the noise level has decreased and the signal level has increased
Answer: A
Explanation
When a client moves away from the AP, the WLAN adapter software determines a threshold from where the client will not be able to achieve the maximum speed. This threshold is product-dependant and relies on values such as the Received Signal Strength Indicator (RSSI), packet error rate, and so on. To avoid losing too many packets or even the connection, the client reverts to a simpler modulation, thus slowing the speed of its communication with the AP.