Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 151:

  A wired packet that is marked for QoS priority CS4 arrives on VLAN-4 at Cisco WLC v7.0, with a destination of a WLAN SSID-4. The Cisco WLC is configured for the wired and wireless QoS level of Silver. The infrastructure routers and switches have incorrect QoS configurations. They have mismarked the CAPWAP outer header to a QoS priority EF.

  Which statement is true about how the packet is sent from the AP to the final WMM wireless client?

  A. The AP sends the packet with an 802.11 priority tag of 0 (Best Effort).
  B. The AP sends the packet with an 802.11 priority tag of 3 (Silver).
  C. The AP sends the packet with an 802.11 priority tag of 5 (Gold).
  D. The AP sends the packet with an 802.11 priority tag of 6 (Platinum).
  B. The AP sends the packet with an 802.11 priority tag of 3 (Silver).

• Question 152:

  When calculating bandwidth usage for an application, what two values represent the minimum and maximum 802.11 overhead per frame? (Choose two.)

  A. 16 bytes
  B. 24 bytes
  C. 28 bytes
  D. 48 bytes
  E. 56 bytes
  F. 60 bytes
  G. 64 bytes
  C. 28 bytes
  F. 60 bytes

• Question 153:

  What is the recommended minimum speed at the edge of the cells in an 802.11g network for a good Cisco VoWLAN deployment?

  A. 11 Mb/s
  B. 12 Mb/s
  C. 18 Mb/s
  D. 36 Mb/s
  E. 54 Mb/s
  B. 12 Mb/s

• Question 154:

  When inspecting the WCS voice readiness tool, an engineer notices yellow areas. What step should you take to fix this?

  A. add additional APs to the coverage area to increase RSSI
  B. increase the power of APs in the yellow area to increase RSSI
  C. remove some APs in the area to reduce co-channel interference
  D. change the channel on some APs in the area to reduce co-channel interference
  A. add additional APs to the coverage area to increase RSSI

• Question 155:

  What are the benefits from enabling TSM for a VoWLAN using a WLC v7.0?

  A. provides packet loss and latency covering the end-to-end voice path on all links
  B. provides packet loss and latency covering the end-to-end voice path on all links and additional parameters on the VoWLAN segment
  C. provides packet loss covering the end-to-end voice path on all links and additional parameters on VoWLAN segment
  D. provides packet loss, latency, and additional parameters on VoWLAN call segment
  D. provides packet loss, latency, and additional parameters on VoWLAN call segment

• Question 156:

  Users are experiencing poor voice quality on a new VoWLAN. Which feature can be used to isolate the issue?

  A. CAC
  B. TSPEC
  C. TSM
  D. U-APSD
  E. EDCA
  C. TSM

• Question 157:

  A customer has deployed an N+N redundant wireless infrastructure. In this deployment, the access points have been salt and peppered between controllers. What configuration would be necessary to cut down on the use of mobility tunnels for voice clients?

  A. re-anchor roamed voice clients
  B. KTS based CAC
  C. mobility anchor
  D. media session snooping
  A. re-anchor roamed voice clients

• Question 158:

  After enabling multicast direct on a WLAN set to Gold QoS, an engineer notices clients are not receiving the video correctly. What setting will correct this issue?

  A. enable best effort QoS Admission
  B. disable best effort QoS Admission
  C. change WLAN QoS to Platinum
  D. change WLAN QoS to Silver
  E. increase RRC Priority of Stream
  F. decrease RRC Priority of Stream
  A. enable best effort QoS Admission

• Question 159:

  How much overhead is added by CAPWAP encapsulation?

  A. 4 B
  B. 14 B
  C. 28 B
  D. 44 B
  E. 50 B
  F. 60 B
  F. 60 B

• Question 160:

  A packet arrives with a decimal value of 12. Which AF class does the packet belong to, and what is the drop probability of the packet? (Choose two.)

  A. AF1
  B. AF2
  C. AF3
  D. AF4
  E. low drop probability
  F. high drop probability
  G. medium drop probability
  A. AF1
  G. medium drop probability