Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 171:

  What three minimal configurations are required for a correctly scaled multicast configuration using WLC v7.0? (Choose three.)

  A. Enable global multicast mode
  B. Enable IGMP snooping
  C. Configure IGMP timeout for 60 seconds
  D. Configure IGMP query interval for 20 seconds
  E. Enable WLAN multicast VLAN feature
  F. Enable AP multicast mode for multicast
  G. Enable AP multicast mode for Unicast
  A. Enable global multicast mode
  B. Enable IGMP snooping
  F. Enable AP multicast mode for multicast

• Question 172:

  When Vocera badges communicate from badge to badge, which voice codec is used?

  A. G.723
  B. G.729A
  C. G.711
  D. G.729B
  E. the Vocera proprietary codec
  E. the Vocera proprietary codec

• Question 173:

  Wireless phones at a customer's site often experience a fast busy signal when trying to initiate calls. What two actions address this issue? (Choose two.)

  A. decrease CAC Max Bandwidth
  B. increase CAC Max Bandwidth
  C. increase CAC Reserved Bandwidth
  D. decrease cell size
  E. increase cell size
  B. increase CAC Max Bandwidth
  D. decrease cell size

• Question 174:

  Using proper VoWLAN design practice, what would be a reasonable 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 175:

  A customer has requested help in configuring priority for emergency calls. What setting needs to be enabled to allow for wireless phones to make emergency calls no matter the load on the access point?

  A. expedited bandwidth
  B. reserved roaming bandwidth reservation
  C. static CAC reservation
  D. SIP CAC
  A. expedited bandwidth

• Question 176:

  Which two statements correctly describe WLAN QoS configuration related to WMM? (Choose two.)

  A. 7920 AP CAC mode is not compatible with WMM policy and cannot be used at the same time.
  B. 7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time.
  C. 7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only.
  D. 7920 AP CAC and 7920 client CAC modes are for 802.11a/n only.
  E. 7920 AP CAC and 7920 client CAC modes are for 802.11a/b/g/n.
  B. 7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time.
  C. 7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only.

• Question 177:

  When reviewing a design for a voice over wireless deployment, what per-call bandwidth cost should be factored in when determining maximum calls per cell using SIP and G.711u as the codec?

  A. 80 bytes
  B. 64 bytes
  C. 10 bytes
  D. 8 bytes
  A. 80 bytes

• Question 178:

  Which two statements describe a dual-mode phone, such as the Apple iPhone 4S with iOS 5.0, in relation to Cisco VoWLAN? (Choose two.)

  A. It contains dual 2.4-GHz and 5-GHz radio.
  B. It contains dual cellular and 2.4-GHz radio.
  C. It contains dual cellular and 5-GHz radio.
  D. The default software enables voice on VoWLAN.
  E. It requires additional software to enable VoWLAN.
  B. It contains dual cellular and 2.4-GHz radio.
  E. It requires additional software to enable VoWLAN.

• Question 179:

  A downstream packet containing a DSCP value arrives at the WLC Ethernet interface from the wired source network. The WLC is configured for QoS WLAN 802.1p mapping. How does the WLC treat the CAPWAP QoS marking when leaving the controller interface for the respective AP and final wireless client destination?

  A. No outer CAPWAP or inner QoS tagging is applied.
  B. No outer CAPWAP QoS tag is applied, but the original DSCP is maintained inside CAPWAP.
  C. The outer CAPWAP CoS is marked and capped while the inner DSCP maintains the original marking.
  D. The outer CAPWAP DHCP is marked and capped without any inner DSCP value.
  C. The outer CAPWAP CoS is marked and capped while the inner DSCP maintains the original marking.

• Question 180:

  A WLC v7.0 is configured for multicast with WLC-to-AP multicast mode using IP address 239.10.10.10, IGMP snooping enabled, and all other parameters set to default. Which two statements describe how a wired ingress broadcast and multicast frame are handled? (Choose two.)

  A. WLC will forward the broadcast frame to all APs and then to all WLANs.
  B. WLC will forward the broadcast frame to all APs and then to only WLANs with active clients.
  C. WLC will forward a broadcast frame to only APs and their respective WLANs with active clients.
  D. WLC will drop the broadcast frame.
  E. WLC will forward the multicast frame to all APs and then to all WLANs.
  F. WLC will forward the multicast frame to all APs and then to only WLANs with active clients.
  G. WLC will forward a multicast frame to only APs and their respective WLANs with active clients.
  H. WLC will drop the multicast frame.
  D. WLC will drop the broadcast frame.
  F. WLC will forward the multicast frame to all APs and then to only WLANs with active clients.