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Cisco 642-742 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 |
| Exam Number: | 642-742 |
| Exam Format: | Multiple-choice single answer, Multiple-choice multiple answer, Drag-and-drop, Simulation |
| Certificate Validity Period: | 3 years |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | 55-75 |
| Related Certifications: | CCIE Wireless |
| Exam Price: | USD 300 |
| Available Languages: | Japanese, English |
| Passing Score: | 750 / 1000 |
| Recommended Training: | Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 |
| Exam Registration: | Pearson VUE Registration |
| Sample Questions: | Cisco 642-742 Sample Questions |
| Exam Way: | Online proctored or onsite at Pearson VUE test centers |
| Pre Condition: | Valid CCNA Wireless certification or any CCIE certification |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams/current-list/642-742.html |
Cisco 642-742 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Troubleshoot VoWLAN and High-Bandwidth Applications | 10% | - Common voice issues and diagnostics - Roaming and QoS troubleshooting - RF and coverage problems |
| Topic 2: Implement QoS for Voice and Video | 23% | - CAC and admission control - TSM and performance monitoring - DSCP and CoS marking - WMM and 802.11e QoS |
| Topic 3: Implement Multicast over Wireless | 15% | - VideoStream and multicast optimization - Multicast for voice and video - Multicast modes and challenges |
| Topic 4: Describe and Design Voice over Wireless Architecture | 27% | - RF design considerations for voice - 802.11 standards and voice enhancements - Roaming and mobility protocols - VoWLAN fundamentals and requirements |
| Topic 5: Implement VoWLAN Features and Security | 25% | - Power save and U-APSD - WLAN configuration for voice clients - Cisco 792x IP phone deployment - Authentication and encryption for voice |
Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:
A customer wants FSR and certificate-based authentication. The solution must be simple to deploy. Which method should be used to meet the requirements?
- A. PEAP-MSCHAPv2 machine authentication
- B. EAP-FAST
- C. PEAP-MSCHAPv2
- D. EAP-TLS
Correct Answer: B 🗳️
Using proper VoWLAN design practice, what would be the Cisco recommended total number of calls for a properly designed 802.11a cell to ensure call quality?
- A. 4
- B. 20
- C. 14
- D. 25
- E. 7
- F. 27
Correct Answer: B 🗳️
VoIP clients can be impacted by jitter. Which of these statements best describes jitter?
- A. Jitter occurs because the receiver buffer is smaller than the sender buffer, thus packets are dropped and voice quality becomes worse.
- B. Jitter can be reduced by designing cells that use only the 802.11a frequency band.
- C. Jitter is defined as variation in the delay of received packets.
- D. A best practice to avoid jitter is to ensure that the end-to-end round-trip time does not exceed 150 ms.
Correct Answer: C 🗳️
A customer reports that wireless clients are not able to receive multicast data from known working multicast servers on the wired network. The client is connecting at the highest mandatory wireless rate of 24 Mbps and the wireless controller is configured for multicastunicast mode. What three actions should the engineer take next to troubleshoot the issue? (Choose three.)
- A. make sure the highest mandatory rate is set to 54 Mbps so that the multicast traffic has sufficient bandwidth
- B. verify that IGMP snooping is disabled on the wireless controller since the access points are handling IGMP messages from the clients
- C. verify Multicast Listener Discovery (MLD) v1 snooping has been enabled to keep track of and deliver IPv4 multicast flows
- D. change the wireless controller from Multicast-Unicast mode to Multicast-Multicast mode and assign a multicast address in the 239.X.X.X/8 subnet
- E. verify that Global Multicast mode has been enabled
- F. verify that the L3 interfaces are configured for pim sparse-dense-mode on the VLAN servicing the wireless access points as well as the wireless controller's management VLAN
Correct Answer: D,E,F 🗳️
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 AF31 and CoS 3
- B. CoS 1
- C. DSCP 46
- D. DSCP CS1 and CoS 1
- E. CoS 3
- F. DSCP 46 and CoS 5
- G. DSCP CS1
- H. DSCP AF31
Correct Answer: D 🗳️
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