642-742 Latest Exam (Aug 2018)

[Free] 2018(Aug) Dumps4cert Cisco 642-742 Dumps with VCE and PDF Download 81-90

August 11, 2018

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Implementing Cisco unified Wireless Voice Networks (IUWVN) v2.0

Question No: 81

Refer to the exhibit.

Dumps4Cert 2018 PDF and VCE

Voice signaling traffic is being sent upstream using a WLAN configured for bronze QoS. Assume that Layer 3 switches between the controller and the AP use the default and recommended CoS-to-DSCP and DSCP-to-CoS maps. What CAPWAP QoS markings are used in the header at location 1?

  1. DSCP CS1

  2. CoS 1

  3. DSCP 46 and CoS 5

  4. CoS 3

  5. DSCP CS1 and CoS 1

  6. DSCP 46

  7. DSCP AF31

  8. DSCP AF31 and CoS 3

Answer: E

Question No: 82

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

  1. An LDAP server for the WLAN

  2. Cisco Unified Mobile Communicator

  3. Cisco Unified Mobility Advantage client

  4. Cisco Unified Mobility Advantage

  5. Cisco Unified Communications Manager

  6. A RADIUS server for the WLAN

Answer: B,D

Question No: 83

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

  1. 7920 AP CAC mode is not compatible with WMM policy and cannot be used at the same time.

  2. 7920 Client CAC mode is not compatible with WMM policy and cannot be used at the same time.

  3. 7920 AP CAC and 7920 client CAC modes are for 802.11b/g/n only.

  4. 7920 AP CAC and 7920 client CAC modes are for 802.11a/n only.

  5. 7920 AP CAC and 7920 client CAC modes are for 802.11a/b/g/n.

Answer: B,C

Question No: 84

A wireless customer has called with a problem regarding voice calls. When a person is put on hold, there is silence and the music on hold does not come across. What is a requirement of music on hold?

  1. Multicast routing should be configured at least to the wireless controller and client

    dynamic interfaces.

  2. There needs to be multicast routing configured network wide from the access point to the wireless controller.

  3. The wireless voice network needs to be configured for a QoS of platinum to permit the multicast traffic.

  4. The music on hold#39;s multicast address needs to be configured for multicast direct.

Answer: A

Question No: 85

An engineer is studying the TSM for a VoWLAN user experiencing issues using a CCXv3 device. What two items will be shown? (Choose two.)

  1. uplink packet latency

  2. uplink packet loss

  3. downlink packet latency

  4. downlink packet loss

  5. uplink MOS score

  6. downlink MOS score

Answer: C,D

Question No: 86

Which DHCP option is used by Vocera badges to reach a Cisco Unified Communications Manager?

  1. Set the option to 66.

  2. Set the option to 43.

  3. Set the option to 150.

  4. No option is required.

Answer: D

Question No: 87

Which of these authentication and encryption combinations would be considered the most


  1. LEAP and WPA TKIP

  2. EAP-FAST and WPA2 AES


  4. WPA-PSK and TKIP

Answer: B

Question No: 88

During the testing and verification phase of an 802.11n deployment, an employee wants to be able to stream video at a much faster rate than the previous 802.11a/b/g deployment.

What 802.11n capability can be utilized for this?

  1. Access points and clients are capable of utilizing spatial-multiplexing, multi-ratio combining, and transmit beamforming, which allows for a more efficient wireless spectrum that can utilize higher data-rates.

  2. Clients can make use of MIMO to aggregate the data sent from the access points whether 802.11n or 802.11a to create a higher throughput network.

  3. Clients can utilize ClientLink which allows them to use the signal received from 802.11n access points on its various radio chains to perform multi-ratio combining.

  4. Clients are able to utilize High-Rate Direct Sequence Spread Spectrum (HR-DSSS) to reach higher data-rates, which in turn allow for much faster video streaming.

Answer: A

Question No: 89

Which statement best describes Cisco Centralized Key Management?

  1. It allows wireless clients to cache their credentials to prevent any reauthentication to the wireless infrastructure during a roaming event.

  2. It allows the wireless infrastructure to cache the credentials to eliminate the need for a full reauthentication when roaming.

  3. It allows controllers to send a directed roam request to a wireless client when a different AP can service the client better.

  4. It allows the wireless client to cache information from surrounding APs to reduce scan time before roaming.

Answer: B

Question No: 90

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.)

  1. Upstream marked as Best Effort.

  2. Upstream marked as ToS CS4.

  3. Upstream marked as DSCP EF.

  4. Downstream marked as DSCP EF.

  5. Downstream marked as Best Effort.

  6. Downstream marked as Silver.

Answer: C,E

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