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Cisco 642-742 Exam Syllabus Topics:

SectionObjectives
QoS for Wireless Voice- WMM (Wi-Fi Multimedia) and prioritization
- End-to-end QoS design
Wireless Voice Fundamentals- 802.11 standards and voice considerations
- Voice over WLAN concepts
Cisco Unified Wireless Architecture- Controller-based WLAN design
- Access point and controller interaction
Call Admission Control (CAC)- CAC mechanisms in WLAN environments
- Bandwidth management for voice sessions
Voice Deployment and Troubleshooting- VoWLAN deployment best practices
- Common voice quality issues and diagnostics
Roaming and Mobility- Fast secure roaming (CCKM, 802.11r concepts)
- Layer 2 and Layer 3 roaming behavior

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

A Cisco WLC v7.0 is configured with the default setting for wired and wireless QoS. When a wireless client sends a voice packet to the AP, how does the AP mark the outer CAPWAP header when the packet is sent to the Cisco WLC v7.0?

  • A. The AP does not match the value to the CAPWAP header, which results in best effort.
  • B. The AP uses the wireless priority value to create a matching 802.1p value in the CAPWAP header.
  • C. The AP uses the wireless priority value to create both a matching 802.1p and DSCP value in the CAPWAP header.
  • D. The AP uses the wireless priority value to create a matching DSCP value in the CAPWAP header.
Answer: A

A small wireless controller-based network is installed and configured inside a corporate building using Cisco 2500 Series controllers and 3500 Series APs using local, monitor, and rogue detector modes. All wireless clients have been working and now require multicast applications. WLC multicast is configured using multicast mode with IP address
239.10.10.10 and other parameters set to default. However, the wireless multicast traffic has limited success and does not work throughout the corporate building. What three actions can help resolve the problems? (Choose three.)

  • A. Change all APs to local mode.
  • B. Change all APs to just local and rogue detector modes.
  • C. Verify IP address and port used by the multicast application.
  • D. Verify router and switch multicast configurations.
  • E. Change WLC from multicast mode to Unicast mode in case of wired multicast infrastructure issues.
  • F. Change all APs to local mode and monitor mode.
  • G. Enable WLC IGMP snooping.
  • H. Increase the WLC-to-AP multicast QoS marking.
Answer: A,C,D

Refer to the exhibit.

What two items need to be supported on the VoWLAN phones in order to take full advantage of this WLAN configuration? (Choose two.)

  • A. WMM
  • B. 802.11r
  • C. 802.11a
  • D. APSD
  • E. SIFS
  • F. 802.11e
Answer: A,F

Which of these authentication and encryption combinations would be considered the most secure?

  • A. EAP-FAST and WPA TKIP
  • B. LEAP and WPA TKIP
  • C. EAP-FAST and WPA2 AES
  • D. WPA-PSK and TKIP
Answer: C

When designing a large, high-availability wireless network, what changes to a mobility-group would create less load on the controllers while maintaining the same mobility messages?

  • A. remove unnecessary controllers from the mobility-group to cut down on the controller's messaging load
  • B. configure mobility-group multicast messaging
  • C. separate the controllers into different mobility-groups per controller to only send relevant messaging to controllers in different groups
  • D. configure the controllers into separate RF-Groups from the mobility-groups to cut down on controller processing load
Answer: B

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