Cisco 642-742 Online Practice Questions and Exam Preparation

Cisco 642-742 Online Questions & Answers

• Question 121:

  IGMP snooping has been enabled on a Cisco WLC v7.0, along with any other configurations that are required for wireless multicast. After a wireless client has joined a multicast group, which IP address is listed by the router as the source reporter for that multicast group?

  A. first wireless client to join
  B. last wireless client to join
  C. Cisco WLC AP management interface address
  D. Cisco WLC management interface address
  E. Cisco WLC virtual interface address
  F. Cisco WLC dynamic interface address
  F. Cisco WLC dynamic interface address

• Question 122:

  Which two Cisco components are required to extend an existing VoWLAN to dual-mode wireless phones? (Choose two.)

  A. An LDAP server for the WLAN
  B. Cisco Unified Mobile Communicator
  C. Cisco Unified Mobility Advantage client
  D. Cisco Unified Mobility Advantage
  E. Cisco Unified Communications Manager
  F. A RADIUS server for the WLAN
  B. Cisco Unified Mobile Communicator
  D. Cisco Unified Mobility Advantage

• Question 123:

  An engineer is configuring a new VoWLAN and wants only IEEE 802.11g/n to be supported. Which two data rates should be configured? (Choose two.)

  A. 18 Mbps and higher should be supported.
  B. Lower than 24 Mbps should be supported.
  C. Lower than 11 Mbps should be disabled.
  D. 1, 2, 5.5, and 11 Mbps should be disabled.
  E. 11 Mbps should be mandatory.
  F. 6 and 9 Mbps should be supported.
  G. 12 Mbps should be mandatory.
  A. 18 Mbps and higher should be supported.
  G. 12 Mbps should be mandatory.

• Question 124:

  Which two pieces of information from the Cisco WLC v7.0 GUI does Monitor > Clients provide about a VoWLAN client? (Choose two.)

  A. RSSI at current AP
  B. WMM state
  C. current MOS
  D. current RF channel
  E. current data rate
  A. RSSI at current AP
  B. WMM state

• Question 125:

  Which two VoWLAN configuration parameters are required to implement a Vocera Communications System on a Cisco WLC v7.0? (Choose two.)

  A. Enable WLC broadcast for WLANs.
  B. Enable WLC multicast for WLANs.
  C. Disable WLAN WMM.
  D. Adjust the radio EDCA profile.
  E. Enable WLAN WMM.
  B. Enable WLC multicast for WLANs.
  C. Disable WLAN WMM.

• Question 126:

  Refer to the exhibit.

  

  What three items of multicast information can be interpreted from the WLC displays? (Choose three.)

  A. WLC-to-AP multicast mode is configured for unicast.
  B. WLC-to-AP multicast mode is configured for multicast using IP address 239.1.1.1.
  C. The ingress WLC multicast stream is IP address 239.1.1.1.
  D. VideoStream is allowed for the wireless client.
  E. VideoStream is not allowed for the wireless client.
  F. IGMP snooping is enabled.
  G. IGMP snooping is disabled.
  H. QoS was configured and lowered to best effort.
  C. The ingress WLC multicast stream is IP address 239.1.1.1.
  E. VideoStream is not allowed for the wireless client.
  F. IGMP snooping is enabled.

• Question 127:

  A small wireless controller-based network is installed and configured inside a corporate building using Cisco 2500 Series controllers and 3500 Series APs using local, monitor, and rogue detector modes. All wireless clients have been working and now require multicast applications. WLC multicast is configured using multicast mode with IP address 239.10.10.10 and other parameters set to default. However, the wireless multicast traffic has limited success and does not work throughout the corporate building. What three actions can help resolve the problems? (Choose three.)

  A. Enable WLC IGMP snooping.
  B. Change WLC from multicast mode to Unicast mode in case of wired multicast infrastructure issues.
  C. Verify router and switch multicast configurations.
  D. Change all APs to just local and rogue detector modes.
  E. Change all APs to local mode and monitor mode.
  F. Change all APs to local mode.
  G. Increase the WLC-to-AP multicast QoS marking.
  H. Verify IP address and port used by the multicast application.
  C. Verify router and switch multicast configurations.
  F. Change all APs to local mode.
  H. Verify IP address and port used by the multicast application.

• Question 128:

  A customer has upgraded to 802.11n with ClientLink, set to defaults, to improve video performance on legacy clients. They notice that ClientLink is not kicking in for an 802.11a client with 36 Mb data rate and - 55db RSSI. What is the problem?

  A. data rate too high
  B. data rate too low
  C. RSSI too high
  D. RSSI too low
  C. RSSI too high

• Question 129:

  Which two statements best describe video conferencing? (Choose two.)

  A. Video streams require maximum quality compression and decompression.
  B. Video streams require high-speed compression and decompression.
  C. H.323 codecs are commonly used.
  D. MPEG codecs are commonly used.
  B. Video streams require high-speed compression and decompression.
  C. H.323 codecs are commonly used.

• Question 130:

  What protocol can be enabled to listen in on IPv4 multicast streams and maintain a map of what each client requests on a wireless LAN controller?

  A. IGMP
  B. MLD
  C. PAP
  D. ICMP
  E. SIP
  F. NTP
  A. IGMP