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Cisco 642-742 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Voice Deployment and Troubleshooting | - Common voice quality issues and diagnostics - VoWLAN deployment best practices |
| Topic 2: Roaming and Mobility | - Layer 2 and Layer 3 roaming behavior - Fast secure roaming (CCKM, 802.11r concepts) |
| Topic 3: Call Admission Control (CAC) | - CAC mechanisms in WLAN environments - Bandwidth management for voice sessions |
| Topic 4: Wireless Voice Fundamentals | - Voice over WLAN concepts - 802.11 standards and voice considerations |
| Topic 5: QoS for Wireless Voice | - WMM (Wi-Fi Multimedia) and prioritization - End-to-end QoS design |
| Topic 6: Cisco Unified Wireless Architecture | - Access point and controller interaction - Controller-based WLAN design |
Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:
When setting up a VoWLAN deployment with Nokia E-Series dual-mode phones and Cisco 7925G phones, the engineer notices the Nokia phones work over cellular but fail over WiFi, whereas the Cisco phones work fine. What setting would cause this behavior?
- A. SSID set to non-broadcast
- B. SSID set to broadcast
- C. WPA2 Enterprise used
- D. CCKM enabled
- E. WPA Enterprise used
- F. CCKM disabled
Correct Answer: A 🗳️
A customer wants FSR and certificate-based authentication. The solution must be simple to deploy. Which method should be used to meet the requirements?
- A. PEAP-MSCHAPv2
- B. EAP-TLS
- C. EAP-FAST
- D. PEAP-MSCHAPv2 machine authentication
Correct Answer: C 🗳️
What is the difference between the QoS values on the wired and wireless sides of a WLAN?
- A. The wireless side of the network uses WMM, which carries voice in the Platinum queue with a CoS of 7. The wired side of the network uses CoS/DSCP values of 5 and 40.
- B. The wireless side of the network uses WMM, which carries voice in the Platinum queue with a CoS of 6. The wired side of the network uses CoS/DSCP values of 5 and EF.
- C. The wireless side of the network uses WMM, which carries voice in the Gold queue with a CoS of 6. The wired side of the network uses CoS/DSCP values of 5 and EF.
- D. The wireless side of the network uses WMM, which carries voice in the Gold queue with a CoS of 7. The wired side of the network uses CoS/DSCP values of 5 and EF.
Correct Answer: B 🗳️
An engineer finishes configuring a voice over wireless deployment. However, during the
testing phase, the 7925 series phones are not able to complete calls and display Network Busy. CAC has been configured for the wireless system. What action should the engineer take next to troubleshoot the issue?
- A. turn off traffic stream metrics
- B. ensure the lowest data rate is 12Mbps and set to Mandatory, and verify there is enough allocated bandwidth to support voice calls
- C. check that the lowest data rate is 5.5Mbps to support TSPEC, and verify that the SSID is set to Platinum
- D. modify the SIP CAC Access Control List on the controller to permit voice traffic for 7925 phones
Correct Answer: B 🗳️
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. Increasing the maximum RF bandwidth in the wireless LAN controller could resolve this issue.
- B. Increasing the reserved roaming bandwidth in the wireless LAN controller could resolve this issue.
- C. The total number of calls allowed on the VoWLAN is 15
- D. Static CAC is configured.
- E. Less than 1076 medium times remain.
- F. LBCAC is configured.
- G. The total number of calls allowed on the VoWLAN is 10.
- H. More than 1076 medium times remain.
Correct Answer: A,D,E,G 🗳️
