Cisco 642-742 Actual Free Exam Questions & Community Discussion

Exam Code/Number: 642-742
Exam Name/Title: Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0
Certification Provider: Cisco
Corresponding Certification: CCNP Wireless

Exam Questions: 190
Updated On: Jun 02, 2026

Question #29

When calculating bandwidth usage for an application, what two values represent the minimum and maximum 802.11 overhead per frame? (Choose two.)

A. 64 bytes

B. 16 bytes

C. 24 bytes

D. 56 bytes

E. 48 bytes

F. 60 bytes

G. 28 bytes

Discussion 0

Correct Answer: F,G Vote an answer

Question #30

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. SSID has been set for a QoS value of Gold.

B. IGMP snooping is turned off because the client cannot request to join a group, only access points can.

C. RTSP is used to stream the video due to wireless multicast not using acknowledgements.

D. SSID has been set for a QoS value of Platinum.

E. Video-stream for the multicast video is configured in the controller.

F. SSID has been configured to allow multicast-direct and multicast-direct has been enabled globally.

Discussion 0

Correct Answer: A,E,F Vote an answer

Question #31

When designing a large, high-availability wireless network, what changes to a mobility-group would create less load on the controllers while maintaining the same mobility messages?

A. separate the controllers into different mobility-groups per controller to only send relevant messaging to controllers in different groups

B. configure the controllers into separate RF-Groups from the mobility-groups to cut down on controller processing load

C. configure mobility-group multicast messaging

D. remove unnecessary controllers from the mobility-group to cut down on the controller's messaging load

Discussion 0

Correct Answer: C Vote an answer

Question #32

Refer to the exhibit.

A customer is experiencing poor call performance on their 7920 wireless phones. The engineer troubleshooting the issue has opened up Cisco Spectrum Expert to try and find the problems. Given this output, what is causing the interference?

A. Xbox wireless controller

B. Bluetooth device

C. microwave

D. RFID

E. jammer

F. cordless phone

Discussion 0

Correct Answer: F Vote an answer

Question #33

An engineer is configuring a new VoWLAN and wants only IEEE 802.11g/n to be supported. Which two data rates should be configured? (Choose two.)

A. 18 Mbps and higher should be supported.

B. 12 Mbps should be mandatory.

C. Lower than 11 Mbps should be disabled.

D. 11 Mbps should be mandatory.

E. 6 and 9 Mbps should be supported.

F. Lower than 24 Mbps should be supported.

G. 1, 2, 5.5, and 11 Mbps should be disabled.

Discussion 0

Correct Answer: A,B Vote an answer

Question #34

DRAG DROP

Discussion 0

Correct Answer:

Question #35

Refer to the exhibit.

What CoS marking is DSCP EF translated too?

A. 6

B. 2

C. 5

D. 4

E. 7

F. 3

Discussion 0

Correct Answer: F Vote an answer

Question #36

A web browser is opened to a new Cisco Unified Wireless IP Phone 7921G or 7925G connected to a windows computer via USB. Which statement describes the ability to read and write configuration parameters to prime the phone for its first VoWLAN association and its association to a Cisco Unified Communications Manager?

A. Phones are read-only and require user to be authenticated as administrator for write access.

B. Phones are always read-only.

C. Phone depends on Cisco Unified Communications Manager configuration.

D. Phone read/write access depends on the firmware version.

Discussion 0

Correct Answer: D Vote an answer

Question #37

A network engineer is viewing the QBSS information in a packet sniff. Which two QBSS characteristics are crucial for successful troubleshooting? (Choose two.)

A. When the client CAC limit is supported, information element number 2 is sent out in the beacons and probe responses on the bg radios.

B. When only WMM is enabled, information element number 1 QBSS Load information element is sent out in the beacons and probe responses.

C. When only WMM is enabled, information element number 2 QBSS Load information element is sent out in the beacons and probe responses.

D. When the client CAC limit is supported, information element number 1 is sent out in the beacons and probe responses on the bg radios.

Discussion 0

Correct Answer: C,D Vote an answer

Question #38

Which three options are benefits of U-APSD? (Choose three.)

A. bandwidth reservation

B. synchronization of the transmission and reception of voice frames

C. priority bandwidth and polling

D. increased call capacity

E. optimized power-save mode periods

Discussion 0

Correct Answer: B,D,E Vote an answer

Question #39

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

A. WMM

B. 802.1q

C. 802.1e

D. 802.1d

E. 802.1p

Discussion 0

Correct Answer: C Vote an answer

Question #40

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. 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.

B. 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.

C. 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.

D. 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.

Discussion 0

Correct Answer: A Vote an answer

Question #41

Which statement best describes Cisco Centralized Key Management?

A. It allows the wireless client to cache information from surrounding APs to reduce scan time before roaming.

B. It allows the wireless infrastructure to cache the credentials to eliminate the need for a full reauthentication when roaming.

C. It allows wireless clients to cache their credentials to prevent any reauthentication to the wireless infrastructure during a roaming event.

D. It allows controllers to send a directed roam request to a wireless client when a different AP can service the client better.

Discussion 0

Correct Answer: B Vote an answer

Question #42

DRAG DROP

Discussion 0

Correct Answer:

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