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

642-742 real exams

Exam Code: 642-742

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

Updated: Sep 27, 2026

Q & A: 190 Questions and Answers

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Cisco 642-742 Exam Syllabus Topics:

SectionWeightObjectives
Implement Multicast over Wireless15%- Multicast for voice and video
- VideoStream and multicast optimization
- Multicast modes and challenges
Implement QoS for Voice and Video23%- CAC and admission control
- WMM and 802.11e QoS
- DSCP and CoS marking
- TSM and performance monitoring
Troubleshoot VoWLAN and High-Bandwidth Applications10%- RF and coverage problems
- Roaming and QoS troubleshooting
- Common voice issues and diagnostics
Implement VoWLAN Features and Security25%- Cisco 792x IP phone deployment
- WLAN configuration for voice clients
- Authentication and encryption for voice
- Power save and U-APSD
Describe and Design Voice over Wireless Architecture27%- 802.11 standards and voice enhancements
- Roaming and mobility protocols
- VoWLAN fundamentals and requirements
- RF design considerations for voice

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

Question #1

Which two statements correctly describe WLAN QoS configuration related to WMM? (Choose two.)

  • A. 7920 AP CAC and 7920 client CAC modes are for 802.11a/b/g/n.
  • B. 7920 AP CAC mode is not compatible with WMM policy and cannot be used at the same time.
  • C. 7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only.
  • D. 7920 AP CAC and 7920 client CAC modes are for 802.11a/n only.
  • E. 7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time.
Reveal Solution  Discussion  0

Correct Answer: C,E  🗳️

Question #2

You have recently enabled multicast on your WLAN. When users join the multicast sessions, you see the traffic utilization on all the APs that are controlled by the Cisco WLC v7.0 increase, which includes those APs where there are no multicast clients.
Which configuration parameter needs to be verified to prevent APs with no subscribed multicast clients from receiving traffic?

  • A. This is normal operation and cannot be changed.
  • B. Switches between the Cisco WLC and APs are not configured for IGMP snooping.
  • C. APs are not configured for IGMP snooping.
  • D. The router interface that services the multicast needs to be configured for the sparse-dense multicast mode of operation.
  • E. The Cisco WLC is not configured for IGMP snooping.
Reveal Solution  Discussion  0

Correct Answer: E  🗳️

Question #3

A packet arrives with a decimal value of 12. Which AF class does the packet belong to, and what is the drop probability of the packet? (Choose two.)

  • A. AF4
  • B. low drop probability
  • C. AF2
  • D. AF1
  • E. medium drop probability
  • F. high drop probability
  • G. AF3
Reveal Solution  Discussion  0

Correct Answer: D,E  🗳️

Question #4

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.
Reveal Solution  Discussion  0

Correct Answer: C,D  🗳️

Question #5

Wireless phones at a customer's site often experience a fast busy signal when trying to initiate calls. What two actions address this issue? (Choose two.)

  • A. decrease cell size
  • B. increase cell size
  • C. decrease CAC Max Bandwidth
  • D. increase CAC Reserved Bandwidth
  • E. increase CAC Max Bandwidth
Reveal Solution  Discussion  0

Correct Answer: A,E  🗳️

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