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Cisco 642-742 Exam Syllabus Topics:

Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:

1. Which two statements best describe streaming video? (Choose two.)

A) Video streams require maximum quality compression and decompression.
B) MPEG codecs are commonly used.
C) H.323 codecs are commonly used.
D) Video streams require a high speed of compression only.

2. Users are experiencing poor audio quality when calling from their 7925 series VoIP Phones. Call quality is exceptional from wired to wired phones, but not from wired to wireless phones. The wired network has QoS deployed properly and the SSID is configured with Platinum QoS. What should be verified to troubleshoot the issue?

A) The controller is marking the 802.1p tag of 6, the AP switchport has been configured to trust CoS, and the controller's switchport to trust DSCP.
B) The controller is marking the 802.1p tag of 3, the AP switchport has been configured to trust DSCP, and the controller's switchport to trust CoS.
C) The controller is marking the 802.1p tag of 5, the AP switchport has been configured to trust DSCP, and the controller's switchport to trust CoS.
D) The controller is marking the 802.1p tag of 4, the AP switchport has been configured to trust CoS, and the controller's switchport to trust DSCP.

3. Refer to the exhibit.

A customer is looking to deploy local radius authentication on their WLAN controller. After configuration has been completed, the administrator found that computers could authenticate; however, the VoIP phones could not. What is the problem given the output?

A) The EAP request-timeout is too short for the wireless phone to process the PAC from the WLAN controller.
B) EAPOL-Key timeout should be set to at least 20,000 Milliseconds to allow the PAC to be processed.
C) EAPOL-Key Max Retries should be set to 12 to ensure the wireless phone can authenticate.
D) The EAP Broadcast Key interval is set to 1 hour however should be 8 hours.

4. VoIP clients can be impacted by jitter. Which of these statements best describes jitter?

A) Jitter occurs because the receiver buffer is smaller than the sender buffer, thus packets are dropped and voice quality becomes worse.
B) Jitter can be reduced by designing cells that use only the 802.11a frequency band.
C) A best practice to avoid jitter is to ensure that the end-to-end round-trip time does not exceed 150 ms.
D) Jitter is defined as variation in the delay of received packets.

5. Enhanced distributed channel access provides contention-free access to the channel for a period. What is the name of this amendment?

A) 802.1e
B) 802.1q
C) 802.1d
D) 802.1p
E) WMM

Solutions: