Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 111:

  A Cisco partner has finished completing a CUWN install for a healthcare customer. After completing the deployment, the support center has received a ticket stating the 7925 VoIP phones will not connect in a few of the remote offices. The phones display 'configuring IP' consistently. What would be the next step for troubleshooting?

  A. verify option 43 has been configured
  B. verify option 150 has been configured
  C. verify the DNS server has been configured
  D. verify the domain name has been configured
  B. verify option 150 has been configured

• Question 112:

  Refer to the exhibit.

  

  A customer is looking to deploy local radius authentication on their WLAN controller. After configuration has been completed, the administrator found that computers could authenticate; however, the VoIP phones could not. What is the problem given the output?

  A. The EAP request-timeout is too short for the wireless phone to process the PAC from the WLAN controller.
  B. The EAP Broadcast Key interval is set to 1 hour however should be 8 hours.
  C. EAPOL-Key Max Retries should be set to 12 to ensure the wireless phone can authenticate.
  D. EAPOL-Key timeout should be set to at least 20,000 Milliseconds to allow the PAC to be processed.
  A. The EAP request-timeout is too short for the wireless phone to process the PAC from the WLAN controller.

• Question 113:

  Which two multicast modes are valid for use with Ethernet bridging on a mesh AP? (Choose two.)

  A. mesh bridge in
  B. regular
  C. bidirectional bridge
  D. in
  E. out
  B. regular
  D. in

• Question 114:

  What is the best practice for configuring data rates for an 802.11b VoWLAN deployment?

  A. Configure mandatory data rates of 11 and 54 Mb/s. Disable data rates below 6 Mb/s and all other data rates as supported.
  B. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s and configure all other data rates as supported.
  C. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s and all other data rates as supported.
  D. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s and all other data rates as supported.
  C. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s and all other data rates as supported.

• Question 115:

  How would an engineer ensure that a wireless client can conduct traffic admission?

  A. verify interface group is configured for traffic admission
  B. verify client supports WME for traffic admission C. verify traffic is admitted as it passes down the OSI layers
  D. verify traffic is admitted by round robin
  B. verify client supports WME for traffic admission C. verify traffic is admitted as it passes down the OSI layers

• Question 116:

  What three changes occur when you replace a legacy 802.11a/b/g Cisco AP with an 802.11a/b/g/n Cisco 3500 Series AP? (Choose three.)

  A. increased data rate at reduced distance
  B. increased data rate at same distance
  C. increased data rate at increased distance
  D. benefits in 2.4 GHz only
  E. benefits in 5 GHz only
  F. benefits in both 2.4 and 5 GHz
  A. increased data rate at reduced distance
  B. increased data rate at same distance
  F. benefits in both 2.4 and 5 GHz

• Question 117:

  A wireless network needs for QoS to be mapped end-to-end to provide reliability for network applications. What two port configurations and QoS markings should be utilized for the switch to accept the APs tags? (Choose two.)

  A. For a local mode AP, the switchport should be configured as an access port trusting the DSCP tag from the AP.
  B. The switch should have MLS QoS enabled with all uplink and downlink ports configured to trust CoS tags. All uplink switches need to trust the CoS tags.
  C. The switch should have MLS QoS enabled with all uplink and downlink ports configured to trust DSCP tags. All uplink switches need to trust the DSCP tags as well.
  D. For a local mode AP, the switchport should be configured as an access port trusting the CoS tag from the AP.
  E. For a local mode AP the switchport should be configured as a trunk port trusting both DSCP or CoS tags from the AP.
  A. For a local mode AP, the switchport should be configured as an access port trusting the DSCP tag from the AP.
  B. The switch should have MLS QoS enabled with all uplink and downlink ports configured to trust CoS tags. All uplink switches need to trust the CoS tags.

• Question 118:

  Using proper VoWLAN design practice, what would be the Cisco recommended total number of calls for a properly designed 802.11g cell to ensure call quality?

  A. 4
  B. 7
  C. 14
  D. 20
  E. 25
  F. 27
  C. 14

• Question 119:

  Which two statements are correct if IGMP snooping is enabled on a Cisco WLC v7.0? (Choose two.)

  A. The router IGMP table is updated with the IP address of the wireless clients as the last reporter.
  B. The IGMP packets from the wireless clients are forwarded to the router without modifications.
  C. The IGMP packets from the wireless clients are received at the Cisco WLC, which generates a query for the client.
  D. The IGMP packets from the wireless clients are received at the WLC and are used to update the router via a Cisco Group Management Protocol update from the Cisco WLC.
  E. The router IGMP table is updated with the IP address of the Cisco WLC as the last reporter.
  C. The IGMP packets from the wireless clients are received at the Cisco WLC, which generates a query for the client.
  E. The router IGMP table is updated with the IP address of the Cisco WLC as the last reporter.

• Question 120:

  Which two applications benefit from upgrading to 802.11n? (Choose two.)

  A. voice
  B. video
  C. database access
  D. digital imaging
  E. SMS
  F. email
  B. video
  D. digital imaging