642-742 exam free practice test

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Exam Number/Code : 642-742
Exam Name : Implementing Cisco Unified Wireless Voice Networks
Questions and Answers : 100 Q&As
Update Time: 2014-06-05

Question:1
Which three options are benefits of U-APSD? (Choose three.)
A. synchronization of the transmission and reception of voice frames
B. bandwidth reservation
C. optimized power-save mode periods
D. increased call capacity
E. priority bandwidth and polling
Answer: A,C,D


Question:2
Which two options allow a Cisco Unified Wireless IP Phone 7925G to conserve its battery? (Choose two.)
A. PS-Poll
B. S-APSD
C. U-APSD
D. 802.11h
E. 802.11r
Answer: A,C


Question: 3
Which statement describes the benefit of WMM U-APSD over legacy 802.11 power-save mode?
A. Client can burst data without standard interframe spacing.
B. Client can burst data without ACKs.
C. Client no longer sends null frame to notify of sleep mode.
D. Client sleep mode is scheduled by AP to reduce jitter.
Answer: A

Question:4
Which two items enable WMM to expedite frames from respective traffic categories? (Choose two.)
Consistent CWmin and CWmax values
Dynamic CWmin and CWmax values
A. AIFS
B. SIFS
C. PIFS
D. DIFS
E. U-APSD
F. PS-Poll
Answer: B,C


Question:5
When a VoWLAN client is in the range of two cells, which two statements describe how the client makes a decision about which cell is the best to associate with? (Choose two.)
A. The client will associate with the cell with the highest RSSI value.
B. The client will associate with the cell with the lowest SNR value.
C. The client will associate with the cell broadcasting the highest 802.11e value.
D. The client will associate with the cell broadcasting the highest TSPEC value.
E. The client will associate with the cell broadcasting the lowest mandatory date rate.
F. The client will associate with the cell broadcasting the highest data rate.
G. The client will associate with the first cell that advertises U-APSD.
Answer: A,B


Question:6
The AP has been properly configured for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dBm. What would be the target value for the cell edge reading?
A. -55 dBm
B. -60 dBm
C. -62 dBm
D. -67 dBm
E. -70 dBm
F. -73 dBm
Answer: C