Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 41:

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

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

• Question 42:

  A client is WME capable and configured for AC_VOICE, but the QoS Priority of 6 is missing when analyzing an 802.11 frame. What three issues need to be investigated? (Choose three.)

  A. WLAN is WMM enabled
  B. DTIM is set to 10
  C. WMM IE present in beacons
  D. WMM IE present in association requests
  E. WMM IE present in association response
  F. WLAN is configured for Platinum QoS
  A. WLAN is WMM enabled
  C. WMM IE present in beacons
  E. WMM IE present in association response

• Question 43:

  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. Perform a detailed analysis of the voice call quality from end to end.
  B. Ask the users to capture voice quality statistics from their wireless IP phones the next time they have issues.
  C. Go into the Cisco WLC and monitor client details for WMM issues.
  D. Locate the APs in question and use the Cisco WLC to enable TSM to capture WLAN voice traffic statistics.
  D. Locate the APs in question and use the Cisco WLC to enable TSM to capture WLAN voice traffic statistics.

• Question 44:

  What happens to a wireless client when it moves from one controller to another in a different mobility domain?

  A. The client will have to reauthenticate, reassociate, and get new IP address information.
  B. The client will have to reauthenticate and reassociate, but will be able to keep its IP address information.
  C. Nothing happens as long as the client roams within the same mobility group.
  D. It is not possible to roam to a different mobility domain.
  A. The client will have to reauthenticate, reassociate, and get new IP address information.

• Question 45:

  After implementing 802.11n SGI in a noisy environment increased interference is noted, at what level would the interference be introduced by the change?

  A. symbols
  B. packets
  C. headers
  D. ACKs
  A. symbols

• Question 46:

  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 mroute
  C. show ip mcache
  D. show ip interface counts
  E. show ip route
  B. show ip mroute

• Question 47:

  DRAG DROP

  Select and Place:

  

  

• Question 48:

  Refer to the exhibit.

  

  An engineer has performed a packet capture on a wireless voice user who is experiencing connectivity problems. Which problem does the exhibit display?

  A. dropped call B. no audio
  C. one-way audio
  D. choppy audio
  E. delays in voice conversation
  C. one-way audio

• Question 49:

  When a Vocera badge performs a broadcast call in a properly configured VoWLAN using WLC v7.0, which two choices indicate how the QoS is marked? (Choose two.)

  A. Upstream marked as Best Effort.
  B. Upstream marked as ToS CS4.
  C. Upstream marked as DSCP EF.
  D. Downstream marked as DSCP EF.
  E. Downstream marked as Best Effort.
  F. Downstream marked as Silver.
  C. Upstream marked as DSCP EF.
  E. Downstream marked as Best Effort.

• Question 50:

  Which statement best describes Cisco Centralized Key Management?

  A. It allows wireless clients to cache their credentials to prevent any reauthentication to the wireless infrastructure during a roaming event.
  B. It allows the wireless infrastructure to cache the credentials to eliminate the need for a full reauthentication when roaming.
  C. It allows controllers to send a directed roam request to a wireless client when a different AP can service the client better.
  D. It allows the wireless client to cache information from surrounding APs to reduce scan time before roaming.
  B. It allows the wireless infrastructure to cache the credentials to eliminate the need for a full reauthentication when roaming.