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

642-437 Exam Simulator
  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Updated: Sep 19, 2026
  • Q & A: 257 Questions and Answers

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Cisco 642-437 Exam Syllabus Topics:

SectionWeightObjectives
Implement Cisco Unified Communications Manager Express18%- IP phone registration and provisioning
- CUCME setup and configuration
- Basic call features and dial plans
Describe VoIP Call Legs and Signaling20%- VoIP architecture and call flow
- H.323, SIP, and MGCP protocols
- Codec selection and media transport
Implement Voice Gateways22%- Fax and modem support
- Gateway types and deployment models
- Analog and digital voice ports
- Dial peers configuration
Describe a Dial Plan13%- Call routing and PSTN connectivity
- Digit manipulation and route patterns
- Dial plan components and functions
Implement QoS for Voice Networks15%- Queuing mechanisms and AutoQoS
- Call Admission Control
- QoS principles and requirements
- Classification, marking, and policing
Implement Gatekeeper and Cisco Unified Border Element12%- CUBE deployment and features
- Interoperability and security
- Gatekeeper functions and configuration

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

Question #1

What are the PHBs that DiffServ use?

  • A. default, AF, EF, and CS PHBs
  • B. resource reservation and admission control
  • C. AF and EF PHBs
  • D. default, AF, and EF PHBs
  • E. AF, EF, and CS PHBs
Reveal Solution  Discussion  0

Correct Answer: A  🗳️

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Question #2

What are the three acceptable values for one-way delay, jitter, and packet loss in a VoIP network? (Choose three.)

  • A. 20 ms for jitter
  • B. 1 percent packet loss
  • C. 0-150 ms for delay
  • D. 30 ms for jitter
  • E. 1 packet loss
  • F. 0-400 ms for delay
Reveal Solution  Discussion  0

Correct Answer: B,C,D  🗳️

Explanation: Only visible for Exam4PDF members. You can sign-up / login (it's free).

Question #3

What is the total bandwidth per call in a link, if you use a G.729 (high-complexity codec) with a 40byte sample and Frame Relay with cRTP?

  • A. 7,420
  • B. 11,200
  • C. 19,200
  • D. 9,600
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #4

If a centralized solution has to be implemented on multiple-equipment vendors devices, which signaling protocol should be used?

  • A. H.323 protocol
  • B. Skinny Client Control Protocol
  • C. Session Initiation Protocol
  • D. Media Gateway Control Protocol
Reveal Solution  Discussion  0

Correct Answer: D  🗳️

Question #5

In which situation would the trust boundary be located at the access layer?

  • A. if PCs are switched through an IP phone and the IP phone traffic can be trusted to mark both traffic streams properly
  • B. if there are endpoints that cannot be trusted and connect directly to the distribution layer
  • C. if the endpoints, both IP phones and PCs, are incapable of marking traffic properly
  • D. if the access layer switch cannot trust or re-mark incoming traffic from endpoints properly
Reveal Solution  Discussion  0

Correct Answer: C  🗳️

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