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Cisco 642-742 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Call Admission Control (CAC) | - CAC mechanisms in WLAN environments - Bandwidth management for voice sessions |
| Topic 2: Roaming and Mobility | - Fast secure roaming (CCKM, 802.11r concepts) - Layer 2 and Layer 3 roaming behavior |
| Topic 3: QoS for Wireless Voice | - End-to-end QoS design - WMM (Wi-Fi Multimedia) and prioritization |
| Topic 4: Wireless Voice Fundamentals | - 802.11 standards and voice considerations - Voice over WLAN concepts |
| Topic 5: Cisco Unified Wireless Architecture | - Access point and controller interaction - Controller-based WLAN design |
| Topic 6: Voice Deployment and Troubleshooting | - Common voice quality issues and diagnostics - VoWLAN deployment best practices |
Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:
A network engineer is having wireless multicast fail when it hits the wired network. What command will show the source of multicast groups for troubleshooting?
- A. show ip igmp
- B. show ip mcache
- C. show ip route
- D. show ip interface counts
- E. show ip mroute
Correct Answer: E 🗳️
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.
Correct Answer: A 🗳️
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 🗳️
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. Go into the Cisco WLC and monitor client details for WMM issues.
- B. Perform a detailed analysis of the voice call quality from end to end.
- C. Locate the APs in question and use the Cisco WLC to enable TSM to capture WLAN voice traffic statistics.
- D. Ask the users to capture voice quality statistics from their wireless IP phones the next time they have issues.
Correct Answer: C 🗳️
Which of these authentication and encryption combinations would be considered the most secure?
- A. EAP-FAST and WPA TKIP
- B. WPA-PSK and TKIP
- C. EAP-FAST and WPA2 AES
- D. LEAP and WPA TKIP
Correct Answer: C 🗳️
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