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

QUESTION NO: 1
A client reports that video is not streaming. The administrator determines the client is connecting at a data rate of 12 Mbps and is trying to stream to a valid multicast address on the network. What three items should the administrator check next to troubleshoot the issue? (Choose three.)

A. Video-stream for the multicast video is configured in the controller. B. SSID has been set for a QoS value of Platinum. C. SSID has been set for a QoS value of Gold. D. IGMP snooping is turned off because the client cannot request to join a group, only access points can. E. RTSP is used to stream the video due to wireless multicast not using acknowledgements. F. SSID has been configured to allow multicast-direct and multicast-direct has been enabled globally.

Correct Answer: A,C,F

QUESTION NO: 2
A customer is having issues streaming video over wireless in a few high-density areas of their campus. After further investigation, the administrator has singled out the issue pertains to the clients associated to 802.11b/g only access points. The rest of the campus is covered in 802.11n access points. What is a possible reason for the issue with video streaming on the 802.11b/g access points as opposed to the 802.11n access points?

A. The wireless clients were all transmitting at 802.11b data rates and would have operated properly had they been transmitting and receiving at 802.11g rates. B. Due to the High-Density environment, there was high-utilization of the wireless spectrum. With 802.11n. the access points are able to aggregate the MSDU and MPDU frames into A-MSDU and A-MPDU frames, utilizing less airtime to transfer data. C. The wireless controller was denying the client access to the video due to multicast-direct supporting the PHY rate of 48000 that the 802.11b/g client could not handle. D. The clients could not transmit data at the highest mandatory rate of 54 Mbps due to limitations with 802.11b/g. This data-rate is only possible when transmitting at 802.11n speeds.

Correct Answer: B

QUESTION NO: 3
What three changes occur when you replace a legacy 802.11a/b/g Cisco AP with an 802.11a/b/g/n Cisco 3500 Series AP? (Choose three.)

A. increased data rate at same distance B. increased data rate at reduced distance C. benefits in 2.4 GHz only D. increased data rate at increased distance E. benefits in both 2.4 and 5 GHz F. benefits in 5 GHz only

Correct Answer: A,B,E

QUESTION NO: 4
What is the best practice for configuring data rates for an 802.11g VoWLAN deployment?

A. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s, and configure all other data rates as supported. B. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s, and configure all other data rates as supported. C. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s, and configure all other data rates as supported. D. Configure mandatory data rates of 12 and 54 Mb/s. Disable data rates below 6 Mb/s, and configure all other data rates as supported.

Correct Answer: C

QUESTION NO: 5
A client's VoWLAN network requires fast roaming on legacy CCXv3 certified devices, which last received an update in 2007. What two fast roaming standards and authentication methods would be supported? (Choose two.)

A. CCKM with EAP-TLS B. CCKM with EAP-FAST C. 802.11r with EAP-FAST D. 802.11r with PEAP E. CCKM with PEAP F. 802.11r with EAP-TLS G. CCKM with LEAP H. 802.11r with LEAP

Correct Answer: B,G

QUESTION NO: 6
A VoWLAN site survey was performed and equipment installed based on recommended design guidelines. Which two statements describe reasons to perform a post-deployment survey? (Choose two.)

A. There is insufficient information by AirMagnet VoFi Analyzer. B. There are changes in temperature in the indoor environment. C. There are roaming pathways. D. There are elevator shafts. E. There is insufficient information about the number of people in the area when the survey is performed.

Correct Answer: C,E

QUESTION NO: 7
Which DHCP option is used by Vocera badges to reach a Cisco Unified Communications Manager?

A. Set the option to 66. B. No option is required. C. Set the option to 43. D. Set the option to 150.

Correct Answer: B

QUESTION NO: 8
Clients are experiencing artifacts in multicast video even though the network was recently upgraded to 802.11n APs. What three configuration changes will be most effective to improve performance? (Choose three.)

A. increase QoS marking on multicast B. enable Call Admission Control C. enable VideoStream D. disable Multicast Messaging E. increase mandatory data rate F. enable 40 MHz wide channels

Correct Answer: B,C,F

QUESTION NO: 9
Refer to the exhibit.

An engineer has performed a debug on wireless voice. Which four conditions can be determined from the information that was gathered? (Choose four.)

A. Static CAC is configured. B. The total number of calls allowed on the VoWLAN is 10. C. More than 1076 medium times remain. D. Less than 1076 medium times remain. E. The total number of calls allowed on the VoWLAN is 15 F. Increasing the maximum RF bandwidth in the wireless LAN controller could resolve this issue. G. Increasing the reserved roaming bandwidth in the wireless LAN controller could resolve this issue. H. LBCAC is configured.

Correct Answer: A,B,D,F

Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 - 642-742 Exam Questions