Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 91:

  IGMP snooping has been enabled on a Cisco WLC v7.0, along with any other configurations that are required for wireless multicast. Which statement describes an IGMP leave message to a router when IGMP snooping is enabled?

  A. The message is sourced from the wireless client.
  B. The message is sourced from the Cisco WLC management interface.
  C. The message is sourced from the Cisco WLC virtual interface.
  D. The message is sourced from the Cisco WLC dynamic interface.
  E. No message is sent, and the membership is timed out.
  E. No message is sent, and the membership is timed out.

• Question 92:

  Refer to the exhibit.

  

  Which three statements describe the WLC configuration? (Choose three.)

  A. CAC values are relatively high.
  B. CAC values are relatively low.
  C. It enables QBSS, given other appropriate configurations.
  D. It enables TSPEC, given other appropriate configurations.
  E. It applies to platinum QoS.
  F. It applies to platinum and gold QoS.
  A. CAC values are relatively high.
  D. It enables TSPEC, given other appropriate configurations.
  E. It applies to platinum QoS.

• Question 93:

  DRAG DROP

  Select and Place:

  

  

• Question 94:

  You have recently added Cisco Unified Wireless IP Phones 7921G and 7925G to your branch office. The new wireless and wired IP phones are experiencing poor call quality when receiving calls across the IP WAN from the remote HQ. What is the most likely issue?

  A. The Cisco Unified Communications Manager bandwidth for the IP WAN link is not properly configured and is allowing more calls than the link can accommodate.
  B. The Cisco Unified Communications Manager bandwidth settings have not been increased to support the new wireless IP phones.
  C. The Cisco Unified Communications Manager bandwidth is set too low, resulting in poor call quality.
  D. The Cisco Unified Communications Manager gatekeeper-controlled CAC has been set too low, resulting in poor call quality.
  A. The Cisco Unified Communications Manager bandwidth for the IP WAN link is not properly configured and is allowing more calls than the link can accommodate.

• Question 95:

  An engineer has been assigned the task of deciding the cell overlap for a wireless voice deployment. Which Cisco measurement recommendation should be considered?

  A. The edge of the cell should be -67 dBm.
  B. One AP should be deployed per 3000 square feet.
  C. The edge of the cell should be below 35 RSSI.
  D. The measurement should be done on the 2.4-GHz band.
  A. The edge of the cell should be -67 dBm.

• Question 96:

  Which two attributes can be enabled for checking by the Voice Audit Tool in Cisco WCS v7.0? (Choose two.)

  A. -67 dBm cell edge
  B. MOS
  C. TSM
  D. DHCP
  E. 25 dB SNR
  C. TSM
  D. DHCP

• Question 97:

  A support technician is reviewing wireless configurations for a voice network. They notice the off channel scan defer has been set for 4, 5, and 6. What would occur if the technician was to deselect 5 and 6?

  A. The access points would go off channel to scan whether there were voice devices transmitting or not.
  B. The access points would only go off channel to scan if there were devices transmitting with a UP of 4.
  C. Wireless clients transmitting at a UP of 5 will cause the access point to cease going off channel to scan.
  D. Cameras transmitting with a UP of 4 will cause the access point to go off channel to scan.
  A. The access points would go off channel to scan whether there were voice devices transmitting or not.

• Question 98:

  An engineer is studying the TSM for a VoWLAN user experiencing issues using a CCXv3 device. What two items will be shown? (Choose two.)

  A. uplink packet latency
  B. uplink packet loss
  C. downlink packet latency
  D. downlink packet loss
  E. uplink MOS score
  F. downlink MOS score
  C. downlink packet latency
  D. downlink packet loss

• Question 99:

  Clients are experiencing artifacts in multicast video even though the network was recently upgraded to 802.11n APs. What three configuration changes will be most effective to improve performance? (Choose three.)

  A. increase mandatory data rate
  B. enable 40 MHz wide channels
  C. enable Call Admission Control
  D. increase QoS marking on multicast
  E. enable VideoStream
  F. disable Multicast Messaging
  B. enable 40 MHz wide channels
  C. enable Call Admission Control
  E. enable VideoStream

• Question 100:

  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. ensure the lowest data rate is 12Mbps and set to Mandatory, and verify there is enough allocated bandwidth to support voice calls
  B. check that the lowest data rate is 5.5Mbps to support TSPEC, and verify that the SSID is set to Platinum
  C. modify the SIP CAC Access Control List on the controller to permit voice traffic for 7925 phones
  D. turn off traffic stream metrics
  A. ensure the lowest data rate is 12Mbps and set to Mandatory, and verify there is enough allocated bandwidth to support voice calls