Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 81:

  A network engineer observes a spike in controller CPU overhead and overall network utilization after enabling multicast on a controller with 500 APs. What feature is necessary to correct the issue?

  A. unicast AP Multicast Mode
  B. multicast AP Multicast Mode
  C. controller IGMP snooping
  D. broadcast forwarding
  B. multicast AP Multicast Mode

• Question 82:

  An engineer notices that the batteries on a Cisco 792X series wireless phone are draining quite a bit even while not placing calls. What should be changed on the SSID to fix this?

  A. set DTIM to 2 on the operational band of the voice clients
  B. enable U-APSD on the WLAN to save power
  C. enable Multicast Direct to cut down on the multicast processing
  D. set P2P to forward down-stream so that clients are not interfering with each other
  A. set DTIM to 2 on the operational band of the voice clients

• Question 83:

  Refer to the exhibit.

  

  Voice bearer traffic is being sent downstream using a WLAN configured for gold QoS. Which two of these options indicate the inner 802.11e QoS markings and QoS CAPWAP markings that are used at location 1? (Choose two.)

  A. Inner 802.11e: UP 6
  B. Outer CAPWAP: DSCP EF and CoS 5
  C. Outer CAPWAP: DSCP 46 and CoS 4
  D. Inner 802.11e: UP 3
  E. Outer CAPWAP: DSCP AF31 and CoS 3
  F. Outer CAPWAP: DSCP AF41 and CoS 4
  G. Outer CAPWAP: CoS 5
  H. Inner 802.11e: UP 5
  C. Outer CAPWAP: DSCP 46 and CoS 4
  H. Inner 802.11e: UP 5

• Question 84:

  A customer wants FSR and certificate-based authentication. The solution must be simple to deploy. Which method should be used to meet the requirements?

  A. EAP-TLS
  B. PEAP-MSCHAPv2
  C. EAP-FAST
  D. PEAP-MSCHAPv2 machine authentication
  C. EAP-FAST

• Question 85:

  Refer to the exhibit.

  

  An engineer has performed a debug on wireless voice. Which four conditions can be determined from the information that was gathered? (Choose four.)

  A. LBCAC is configured.
  B. Static CAC is configured.
  C. More than 1076 medium times remain.
  D. Less than 1076 medium times remain.
  E. The total number of calls allowed on the VoWLAN is 10.
  F. The total number of calls allowed on the VoWLAN is 15
  G. Increasing the maximum RF bandwidth in the wireless LAN controller could resolve this issue.
  H. Increasing the reserved roaming bandwidth in the wireless LAN controller could resolve this issue.
  B. Static CAC is configured.
  D. Less than 1076 medium times remain.
  E. The total number of calls allowed on the VoWLAN is 10.
  G. Increasing the maximum RF bandwidth in the wireless LAN controller could resolve this issue.

• Question 86:

  Refer to the exhibit.

  

  A controller has been completely configured to support high definition video over wireless. During the testing phase, a packet capture shows the video-stream traffic on the wire as best effort. What needs to be changed in the configuration to support QoS tags properly?

  A. add the line mls qos trust cos
  B. add the line mls qos trust dscp
  C. add the line priority queue in
  D. add the line mls qos trust device wlc
  A. add the line mls qos trust cos

• Question 87:

  Refer to the exhibit.

  

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

  A. AP will effectively allow 75% of bandwidth for local new calls.
  B. AP will effectively allow 69% of bandwidth for local new calls.
  C. AP will effectively allow 81% of bandwidth for local new calls.
  D. Priority roaming calls can be expedited.
  E. Priority new calls can be expedited.
  B. AP will effectively allow 69% of bandwidth for local new calls.
  E. Priority new calls can be expedited.

• Question 88:

  Which three statements are true about load-based Call Admission Control? (Choose three.)

  A. grants a VoWLAN client-initiated call based on the number of active clients associated to the AP
  B. grants a VoWLAN client-initiated call based on channel bandwidth capacity
  C. uses the 802.11i specifications
  D. uses ADDTS action frames
  E. requires a WMM-enabled client
  B. grants a VoWLAN client-initiated call based on channel bandwidth capacity
  D. uses ADDTS action frames
  E. requires a WMM-enabled client

• Question 89:

  Which statement best describes the ideal VoWLAN design?

  A. smaller cells with all data rates enabled to ensure that all clients can associate
  B. smaller cells with higher data rates enabled and admission control enabled through WMM
  C. larger cells with higher data rates enabled and WPA2 to secure voice conversations
  D. smaller cells with higher data rates enabled and no overlap to prevent co-channel interference
  B. smaller cells with higher data rates enabled and admission control enabled through WMM

• Question 90:

  Which statement describes the benefit of WMM U-APSD over legacy 802.11 power-save mode?

  A. Client can burst data without standard interframe spacing.
  B. Client can burst data without ACKs.
  C. Client no longer sends null frame to notify of sleep mode.
  D. Client sleep mode is scheduled by AP to reduce jitter.
  A. Client can burst data without standard interframe spacing.