642-742 Guide

642-742 quick reference (11 to 20)

Exam Code: 642-742 (Practice Exam Latest Test Questions VCE PDF)
Exam Name: CCNP Wireless - IUWVN
Certification Provider: Cisco
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2021 Jan cisco 642-742:

Q11. What is the best practice for configuring data rates for an 802.11b VoWLAN deployment? 

A. Configure mandatory data rates of 11 and 54 Mb/s. Disable data rates below 6 Mb/s and all other data rates as supported. 

B. Configure a mandatory data rate of 6 Mb/s. Disable data rates below 6 Mb/s and configure all other data rates as supported. 

C. Configure a mandatory data rate of 11 Mb/s. Disable data rates below 11 Mb/s and all other data rates as supported. 

D. Configure a mandatory data rate of 12 Mb/s. Disable data rates below 12 Mb/s and all other data rates as supported. 

Answer:


Q12. 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. 

Answer: CFH 


Q13. What three changes occur when you replace a legacy 802.11a/b/g Cisco AP with an 802.11a/b/g/n Cisco 3500 Series AP? (Choose three.) 

A. increased data rate at reduced distance 

B. increased data rate at same distance 

C. increased data rate at increased distance 

D. benefits in 2.4 GHz only 

E. benefits in 5 GHz only 

F. benefits in both 2.4 and 5 GHz 

Answer: ABF 


Q14. VoWLAN implementation plans for a current mix of existing Cisco Unified Wireless IP Phones 7920G and 7921G to a final migration of Wireless IP Phones 7925G in a single WLAN. What would be the most appropriate WLC WLAN configuration to end with Wireless IP Phones 7925G? 

A. 7920 Client CAC = enabled only; Radio Policy = All; WMM = Disabled 

B. 7920 AP CAC = enabled only; Radio Policy = All; WMM = Allowed 

C. 7920 Client CAC = enabled only; Radio Policy = 802.11a only; WMM = Disabled 

D. 7920 AP CAC = enabled only; Radio Policy = 802.11a only; WMM = Allowed 

E. 7920 Client CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Disabled 

F. 7920 AP CAC = enabled only; Radio Policy = 802.11b/g only; WMM = Allowed 

Answer:


Q15. Refer to the exhibit. 

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? 

A. DSCP CS1 

B. CoS 1 

C. DSCP 46 and CoS 5 

D. CoS 3 

E. DSCP CS1 and CoS 1 

F. DSCP 46 

G. DSCP AF31 

H. DSCP AF31 and CoS 3 

Answer:


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Q16. The AP has been properly configured for a VoWLAN survey. The RF environment contains a noise of -87 to -90 dBm. What would be the target value for the cell edge reading? 

A. -55 dBm 

B. -60 dBm 

C. -62 dBm 

D. -67 dBm 

E. -70 dBm 

F. -73 dBm 

Answer:


Q17. Which two options allow a Cisco Unified Wireless IP Phone 7925G to conserve its battery? (Choose two.) 

A. PS-Poll 

B. S-APSD 

C. U-APSD 

D. 802.11h 

E. 802.11r 

Answer: AC 


Q18. 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 

Answer:


Q19. You have a VoWLAN configured for platinum QoS, WMM, and CAC. IP phones for this VoWLAN include the Nokia and Cisco Unified Wireless IP Phones 7920G (pre-v2.0 firmware), 7921G, and 7925G. The Wireless IP Phones 7921G and 7925G work properly, but the Nokia and the Wireless IP Phones 7920G associate with the WLAN but cannot place calls. What is the issue? 

A. The lowest mandatory speed in the WLAN is too high and needs to be reduced. 

B. The Cisco Unified Wireless IP Phones 7920G and Nokia IP phones do not support TSPEC. 

C. EDCA needs to be enabled on the WLAN. 

D. HCCA needs to be enabled on the WLAN. 

E. The reserved roaming bandwidth setting is set too low. 

F. The expedited bandwidth setting needs to be enabled. 

Answer:


Q20. Which two items enable WMM to expedite frames from respective traffic categories? (Choose two.) 

Consistent CWmin and CWmax values 

Dynamic CWmin and CWmax values 

A. AIFS 

B. SIFS 

C. PIFS 

D. DIFS 

E. U-APSD 

F. PS-Poll 

Answer: BC 


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