Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 : 642-742

642-742 real exams

Exam Code: 642-742

Exam Name: Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0

Updated: Aug 19, 2026

Q & A: 190 Questions and Answers

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Cisco 642-742 Exam Syllabus Topics:

SectionObjectives
Topic 1: Voice Deployment and Troubleshooting- VoWLAN deployment best practices
- Common voice quality issues and diagnostics
Topic 2: Wireless Voice Fundamentals- 802.11 standards and voice considerations
- Voice over WLAN concepts
Topic 3: QoS for Wireless Voice- End-to-end QoS design
- WMM (Wi-Fi Multimedia) and prioritization
Topic 4: Roaming and Mobility- Fast secure roaming (CCKM, 802.11r concepts)
- Layer 2 and Layer 3 roaming behavior
Topic 5: Cisco Unified Wireless Architecture- Controller-based WLAN design
- Access point and controller interaction
Topic 6: Call Admission Control (CAC)- CAC mechanisms in WLAN environments
- Bandwidth management for voice sessions

Cisco Implementing Cisco Unified Wireless Voice Networks (IUWVN) v2.0 Sample Questions:

1. The customer has deployed C7260 phones with clients connected to them. What switch feature could be enabled to distinguish IP voice traffic from client data traffic?

A) Weighted Queuing
B) WME
C) Voice VLAN
D) QoS routing
E) QBSS


2. A wired packet that is marked for QoS priority CS4 arrives on VLAN-4 at Cisco WLC v7.0, with a destination of a WLAN SSID-4. The Cisco WLC is configured for the wired and
wireless QoS level of Silver. The infrastructure routers and switches have incorrect QoS configurations. They have mismarked the CAPWAP outer header to a QoS priority EF.
Which statement is true about how the packet is sent from the AP to the final WMM wireless client?

A) The AP sends the packet with an 802.11 priority tag of 5 (Gold).
B) The AP sends the packet with an 802.11 priority tag of 0 (Best Effort).
C) The AP sends the packet with an 802.11 priority tag of 3 (Silver).
D) The AP sends the packet with an 802.11 priority tag of 6 (Platinum).


3. A customer has deployed an N+N redundant wireless infrastructure. In this deployment, the access points have been salt and peppered between controllers. What configuration would be necessary to cut down on the use of mobility tunnels for voice clients?

A) mobility anchor
B) media session snooping
C) KTS based CAC
D) re-anchor roamed voice clients


4. Enhanced distributed channel access provides contention-free access to the channel for a period. What is the name of this amendment?

A) 802.1q
B) WMM
C) 802.1d
D) 802.1p
E) 802.1e


5. Which three statements are true about load-based Call Admission Control? (Choose three.)

A) uses the 802.11i specifications
B) uses ADDTS action frames
C) grants a VoWLAN client-initiated call based on the number of active clients associated to the AP
D) requires a WMM-enabled client
E) grants a VoWLAN client-initiated call based on channel bandwidth capacity


Solutions:

Question # 1
Answer: C
Question # 2
Answer: B
Question # 3
Answer: D
Question # 4
Answer: E
Question # 5
Answer: B,D,E

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