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

  • Exam Code: 642-742
  • Exam Name: Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0
  • Updated: Sep 16, 2026
  • Q & A: 190 Questions and Answers

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Cisco 642-742 Exam Syllabus Topics:

SectionObjectives
Quality of Service (QoS) for Wireless Voice- WLC and controller QoS configuration
- Implementing QoS on wireless and wired infrastructure
VoWLAN Implementation and Troubleshooting- Troubleshoot VoWLAN issues
- Configure WLAN for voice
Voice over Wireless LAN (VoWLAN) Fundamentals- VoWLAN architecture and call flow
- Wireless design considerations for voice
Multicast over Wireless- Configure and troubleshoot multicast over wireless
- Multicast concepts and implications for wireless
Preparing for High-Bandwidth Wireless Applications- Support for video and latency-sensitive applications
- Bandwidth planning for wireless networks

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

Question #1

VoWLAN implementation plans for a current mix of existing Cisco Unified Wireless IP Phones 7920G and 7921G to a final migration of Wireless IP Phones 7925G in a single WLAN. What would be the most appropriate WLC WLAN configuration to end with Wireless IP Phones 7925G?

  • A. 7920 AP CAC = enabled only; Radio Policy = 802.11a only; WMM = Allowed
  • B. 7920 Client CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Disabled
  • C. 7920 AP CAC = enabled only; Radio Policy = All; WMM = Allowed
  • D. 7920 Client CAC = enabled only; Radio Policy = All; WMM = Disabled
  • E. 7920 Client CAC = enabled only; Radio Policy = 802.11a only; WMM = Disabled
  • F. 7920 AP CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Allowed
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #2

A Cisco partner has finished completing a CUWN install for a healthcare customer. After completing the deployment, the support center has received a ticket stating the 7925 VoIP phones will not connect in a few of the remote offices. The phones display 'configuring IP' consistently. What would be the next step for troubleshooting?

  • A. verify the DNS server has been configured
  • B. verify the domain name has been configured
  • C. verify option 43 has been configured
  • D. verify option 150 has been configured
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #3

A corporation has a Cisco Unified Wireless Network that has been deployed for voice coverage. The wireless data rates have been tuned to mandatory rates of 18 Mbps and 36 Mbps. Some wireless clients have been experiencing drops streaming multicast video while moving throughout the building. What is the cause of the drop in video?

  • A. Clients are connected at 18Mbps; however, other clients are connecting at 12Mbps and are causing the multicast video to degrade.
  • B. Clients are maintaining a 12Mbps rate and cannot receive the stream at 18Mbps.
  • C. Clients are roaming at lower data rates and are not maintaining 36Mbps connectivity.
  • D. Clients are not roaming due to coverage. This is causing the multicast data to drop due to the client re-associating often.
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

Question #4

Which four statements describe the attributes of streaming video? (Choose four.)

  • A. One-way latency is limited to 150 ms.
  • B. One-way latency is limited to a few seconds.
  • C. Packet loss is limited to 5 percent.
  • D. QoS marking is at CS4.
  • E. QoS marking is at AF41.
  • F. Packet loss is limited to 1 percent.
  • G. Jitter is limited to 30 ms.
  • H. Jitter has no significant requirements.
Reveal Solution  Discussion  0

Correct Answer: B,C,D,H  🗳️

Question #5

Wireless IP phone users are complaining that during the day there are certain points in the facility where voice quality is poor. How should you troubleshoot this issue?

  • A. Locate the APs in question and use the Cisco WLC to enable TSM to capture WLAN voice traffic statistics.
  • B. Ask the users to capture voice quality statistics from their wireless IP phones the next time they have issues.
  • C. Go into the Cisco WLC and monitor client details for WMM issues.
  • D. Perform a detailed analysis of the voice call quality from end to end.
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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