Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 51:

  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. separate the controllers into different mobility-groups per controller to only send relevant messaging to controllers in different groups
  C. configure mobility-group multicast messaging
  D. configure the controllers into separate RF-Groups from the mobility-groups to cut down on controller processing load
  C. configure mobility-group multicast messaging

• Question 52:

  After debugging a VoWLAN client that is experiencing dropped calls, it has been found that the client is requesting a new DHCP address every time the client roams to a new AP. What should be configured in the WLAN?

  A. Select the DHCP server override option.
  B. Decrease the DHCP allocated lease time to 0.
  C. Deselect the DHCP address assignment required option.
  D. Select the central DHCP processing option.
  E. Increase the DHCP allocated lease time for wireless clients.
  F. Deselect the enable session timeout.
  C. Deselect the DHCP address assignment required option.

• Question 53:

  DRAG DROP

  Select and Place:

  

  

• Question 54:

  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
  D. Request Timeout to 30

• Question 55:

  After enabling global multicast, multicast traffic has been flooding the wired and wireless network. The wireless engineer has been troubleshooting and is attempting to find the source of the traffic. What command will display the multicast traffic source as well as the incoming interface?

  A. show ip mroute
  B. show ip igmp groups
  C. show ip pim neighbor
  D. show ip device tracking all
  A. show ip mroute

• Question 56:

  Refer to the exhibit.

  

  A customer is experiencing poor call performance on their 7920 wireless phones. The engineer troubleshooting the issue has opened up Cisco Spectrum Expert to try and find the problems. Given this output, what is causing the interference?

  A. cordless phone
  B. Bluetooth device
  C. Xbox wireless controller
  D. microwave
  E. RFID
  F. jammer
  A. cordless phone

• Question 57:

  Which two items enable WMM to expedite frames from respective traffic categories? (Choose two.)

  Consistent CWmin and CWmax values Dynamic CWmin and CWmax values

  A. AIFS
  B. SIFS
  C. PIFS
  D. DIFS
  E. U-APSD
  F. PS-Poll
  B. SIFS
  C. PIFS

• Question 58:

  You are getting complaints from Cisco Unified Wireless IP Phone 7925 users that their phones are failing to register with the Cisco Unified Communications Manager Express server and are showing the message "Registering." What is the problem?

  A. The IP phones are failing to receive a DHCP address from the DHCP server.
  B. There is no ephone configuration for each phone in the Cisco Unified CME device.
  C. The IP phones are failing to receive their firmware files from the TFTP server.
  D. The DHCP server needs to include the command option 66 ip to serve the appropriate load file.
  C. The IP phones are failing to receive their firmware files from the TFTP server.

• Question 59:

  When verifying a voice survey with a Cisco 7925G phone in site survey mode, what information can be found in the CU field?

  A. Channel Utilization
  B. Connected Users
  C. Channel Used
  D. Channel Unavailable
  E. Concurrent Users
  F. CUCM Users
  A. Channel Utilization

• Question 60:

  Refer to the exhibit.

  

  What CoS marking is DSCP EF translated too?

  A. 2
  B. 3
  C. 4
  D. 5
  E. 6
  F. 7
  B. 3