Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) : 642-437

642-437 real exams

Exam Code: 642-437

Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)

Updated: Aug 07, 2026

Q & A: 257 Questions and Answers

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Cisco 642-437 Exam Syllabus Topics:

SectionObjectives
VoIP Fundamentals- Voice over IP architecture and components
- Voice traffic signaling basics
- Voice codecs and compression techniques
Signaling and Call Control- SIP, H.323, and MGCP protocols
- Dial plans and call routing
- Gateways and gatekeepers
Call Admission Control and Performance- Call admission control mechanisms
- Voice network performance considerations
Quality of Service (QoS)- Traffic classification and marking
- QoS models and mechanisms
- Queuing techniques and bandwidth management
- Congestion management and avoidance
Troubleshooting and Operations- Voice and QoS troubleshooting methodologies
- Common VoIP deployment issues

Cisco Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0) Sample Questions:

1. Which Cisco voice feature can you use to connect together two Session Initiation Protocol networks?

A) Cisco Unified Border Element
B) SIP gatekeeper
C) Cisco Transcoding
D) class of restriction


2. Refer to the exhibit.

Consider an outgoing call that is being placed in all three scenarios that are shown in the exhibit. What is the result of the call, going down the table from top to bottom?

A) fail, success, fail
B) fail, success, success
C) success, success, fail
D) success, fail, fail
E) success, fail, success
F) success, success, success


3. Which option is used within a dial plan to define the destination that a user is allowed to call?

A) calling privileges
B) calling peers
C) destination patterns
D) dial peers


4. Refer to the exhibit.

Cisco 642-437 Exam
When an international call to 90114989531212001 is placed from extension 2001, which of the following statements is true?

A) The call will succeed because the incoming COR list is a superset of the outgoing COR list.
B) The call will fail because the incoming COR list is not a superset of the outgoing COR list
C) The call will succeed because the incoming COR list has the highest priority, by default, when no incoming COR list is applied.
D) The call will fail because no incoming COR list is applied.


5. Which two statements describe ways that AutoQoS VoIP configuration is applied on a Cisco catalyst switch? (Choose two.)

A) The auto qos voip cisco-phone command is applied to each interface.
B) The auto qos voip command is applied to each interface.
C) The auto qos voip trust command is applied to each interface.
D) The auto qos voip command is applied globally in the switch.


Solutions:

Question # 1
Answer: A
Question # 2
Answer: F
Question # 3
Answer: A
Question # 4
Answer: C
Question # 5
Answer: A,C

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