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NO.1 Users are experiencing poor voice quality on a new VoWLAN. Which feature can be used to
isolate the issue?
A. TSM
B. EDCA
C. U-APSD
D. CAC
E. TSPEC
Answer: A

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NO.2 In order to place a call, what is the first step that a wireless phone must do?
A. Register with a call agent.
B. Update its firmware with the Call Manager.
C. Authenticate with the web authentication server.
D. Associate with the wireless infrastructure.
Answer: D
642-742 Test Questions 

NO.3 Refer to the exhibit.
What two items of multicast information can be interpreted from the WLC display? (Choose two.)
A. WLC-to-AP multicast mode is configured for multicast.
B. IGMP snooping is disabled.
C. VideoStream is allowed for the wireless client.
D. VideoStream is not allowed for the wireless client.
E. WLC-to-AP multicast mode is configured for Unicast.
F. IGMP snooping is enabled.
Answer: C,F
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