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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 27, 2026 Q & A: 190 Questions and Answers
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Following are some reference material for actual Cisco 642-742 exam test
Cisco 642-742 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Preparing for High-Bandwidth Wireless Applications | - Support for video and latency-sensitive applications - Bandwidth planning for wireless networks |
| VoWLAN Implementation and Troubleshooting | - Troubleshoot VoWLAN issues - Configure WLAN for voice |
| Quality of Service (QoS) for Wireless Voice | - Implementing QoS on wireless and wired infrastructure - WLC and controller QoS configuration |
| Multicast over Wireless | - Multicast concepts and implications for wireless - Configure and troubleshoot multicast over wireless |
| Voice over Wireless LAN (VoWLAN) Fundamentals | - Wireless design considerations for voice - VoWLAN architecture and call flow |
Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:
Question #1
Refer to the exhibit.
A network engineer is troubleshooting wireless voice issues on a network using EAP-FAST with PAC provisioning. Authentication is working properly on laptops but is failing on phones. What configuration change is needed?
- A. Identity Request Timeout to 60
- B. Identity Request Timeout to 10
- C. Request Timeout to 5
- D. Request Timeout to 30
- E. EAPOL-Key Max Retries to 1
- F. EAPOL-Key Max Retries to 5
Correct Answer: D 🗳️
Question #2
Which two Cisco components are required to extend an existing VoWLAN to dual-mode wireless phones? (Choose two.)
- A. Cisco Unified Mobile Communicator
- B. An LDAP server for the WLAN
- C. Cisco Unified Mobility Advantage client
- D. Cisco Unified Communications Manager
- E. A RADIUS server for the WLAN
- F. Cisco Unified Mobility Advantage
Correct Answer: A,F 🗳️
Question #3
The AP has been properly configured for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dBm. What would be the target value for the cell edge reading?
- A. -73 dBm
- B. -67 dBm
- C. -70 dBm
- D. -55 dBm
- E. -60 dBm
- F. -62 dBm
Correct Answer: F 🗳️
Question #4
Dual-mode phone users are requesting the ability to transfer calls from VoIP to cellular and the engineer has decided to implement the Handoff DN method. What information is required by the Call Manager?
- A. SIP connection to cell provider
- B. H.323 connection to cell provider
- C. incoming caller ID
- D. outgoing caller ID
Correct Answer: C 🗳️
Question #5
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 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.
- 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 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.
Correct Answer: B 🗳️
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