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Updated: Jul 24, 2026
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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 |
| Certificate Validity Period: | 3 years (Cisco certification validity cycle) |
| Passing Score: | Variable (typically around 790/1000, Cisco scaled scoring) |
| Related Certifications: | CCNP Wireless CCNA Wireless |
| Exam Format: | Multiple choice, Multiple response, Simulation-based questions |
| Exam Duration: | 90 minutes |
| Real Exam Qty: | Approximately 55–65 |
| Exam Price: | USD 300 (varies by region) |
| Available Languages: | English |
| Recommended Training: | Cisco Authorized Training Courses Cisco Learning Network - Wireless Training Resources |
| Exam Registration: | Cisco Certification Exam Registration (Pearson VUE) |
| Sample Questions: | Cisco 642-742 Sample Questions |
| Exam Way: | Proctored exam delivered via Pearson VUE (online or authorized test center) |
| Pre Condition: | No strict prerequisites, but CCNA Wireless or equivalent knowledge recommended. |
| Official Syllabus URL: | https://www.cisco.com/c/en/us/training-events/training-certifications/exams.html |
Cisco 642-742 Exam Syllabus Topics:
| Section | Objectives |
|---|---|
| Topic 1: Call Admission Control (CAC) | - CAC mechanisms in WLAN environments - Bandwidth management for voice sessions |
| Topic 2: Voice Deployment and Troubleshooting | - VoWLAN deployment best practices - Common voice quality issues and diagnostics |
| Topic 3: QoS for Wireless Voice | - End-to-end QoS design - WMM (Wi-Fi Multimedia) and prioritization |
| Topic 4: Wireless Voice Fundamentals | - 802.11 standards and voice considerations - Voice over WLAN concepts |
| Topic 5: Roaming and Mobility | - Layer 2 and Layer 3 roaming behavior - Fast secure roaming (CCKM, 802.11r concepts) |
| Topic 6: Cisco Unified Wireless Architecture | - Controller-based WLAN design - Access point and controller interaction |
Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:
1. An engineer notices that the batteries on a Cisco 792X series wireless phone are draining quite a bit even while not placing calls. What should be changed on the SSID to fix this?
A) set DTIM to 2 on the operational band of the voice clients
B) enable Multicast Direct to cut down on the multicast processing
C) enable U-APSD on the WLAN to save power
D) set P2P to forward down-stream so that clients are not interfering with each other
2. After enabling global multicast, multicast traffic has been flooding the wired and wireless network. The wireless engineer has been troubleshooting and is attempting to find the source of the traffic. What command will display the multicast traffic source as well as the incoming interface?
A) show ip igmp groups
B) show ip pim neighbor
C) show ip mroute
D) show ip device tracking all
3. Which two statements are correct if IGMP snooping is enabled on a Cisco WLC v7.0? (Choose two.)
A) The IGMP packets from the wireless clients are received at the Cisco WLC, which generates a query for the client.
B) The IGMP packets from the wireless clients are forwarded to the router without modifications.
C) The router IGMP table is updated with the IP address of the wireless clients as the last reporter.
D) The IGMP packets from the wireless clients are received at the WLC and are used to update the router via a Cisco Group Management Protocol update from the Cisco WLC.
E) The router IGMP table is updated with the IP address of the Cisco WLC as the last reporter.
4. A network engineer is viewing the QBSS information in a packet sniff. Which two QBSS characteristics are crucial for successful troubleshooting? (Choose two.)
A) When the client CAC limit is supported, information element number 2 is sent out in the beacons and probe responses on the bg radios.
B) When only WMM is enabled, information element number 1 QBSS Load information element is sent out in the beacons and probe responses.
C) When only WMM is enabled, information element number 2 QBSS Load information element is sent out in the beacons and probe responses.
D) When the client CAC limit is supported, information element number 1 is sent out in the beacons and probe responses on the bg radios.
5. Enhanced distributed channel access provides contention-free access to the channel for a period. What is the name of this amendment?
A) 802.1p
B) 802.1q
C) 802.1e
D) 802.1d
E) WMM
Solutions:
| Question # 1 Answer: A | Question # 2 Answer: C | Question # 3 Answer: A,E | Question # 4 Answer: C,D | Question # 5 Answer: C |
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