• Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • Certification Provider: Cisco
  • Corresponding Certification:CCNP
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642-437 exam dumps

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  • Exam Code: 642-437
  • Exam Name: Implementing Cisco Unified Communications Voice over IP and QoS v8.0 (CVOICE v8.0)
  • No. of Questions: 257 Questions and Answers
  • Updated: Sep 09, 2026

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Cisco 642-437 Exam Syllabus Topics:

SectionObjectives
Topic 1: VoIP Fundamentals- Voice over IP basics
  • 1. VoIP components and operation
    • 2. Voice signaling protocols (H.323, SIP)
      Topic 2: Voice Gateways and Call Routing- Gateway implementation and configuration
      • 1. Dial peers and dial plan implementation
        • 2. Voice gateway interfaces and DSPs
          Topic 3: Quality of Service (QoS)- QoS mechanisms
          • 1. AutoQoS and queuing
            • 2. DiffServ and classification
              Topic 4: Cisco Unified Communications Manager Express- CUCME configuration
              • 1. Endpoint addressing and ephone setup
                • 2. Call handling and features
                  Topic 5: Troubleshooting- Troubleshooting voice and QoS issues
                  • 1. Common voice call issues
                    • 2. Diagnostics and show/debug commands
                      Topic 6: Cisco Unified Border Element (CUBE)- CUBE features and configuration
                      • 1. SIP trunks and interworking
                        • 2. Media flow and protocol interworking

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

                          What is the minimum number of RSVP peers that are necessary for a Cisco Unified Border Element to provide Call Admission Control?

                          • A. 4
                          • B. 2
                          • C. 1
                          • D. 0
                          • E. 3
                          Reveal Solution  Discussion  0

                          Correct Answer: B  πŸ—³οΈ

                          Which four are benefits of VLANs in an organization? (Choose four.)

                          • A. better VLAN database
                          • B. increased security
                          • C. improved manageability
                          • D. quick response to ping times
                          • E. better LAN infrastructure
                          • F. physical topology independence
                          • G. switch is able to reboot faster
                          • H. increased performance
                          Reveal Solution  Discussion  0

                          Correct Answer: B,C,F,H  πŸ—³οΈ

                          Which component in the Media Gateway Control Protocol environment is responsible for controlling the operation of the gateways?

                          • A. gatekeeper
                          • B. calling authority
                          • C. call agent
                          • D. gate master
                          Reveal Solution  Discussion  0

                          Correct Answer: C  πŸ—³οΈ

                          DRAG DROP
                          Drag and drop the appropriate call-signaling term to the correct box in the diagram to establish RSVF-based Call Admission Control between the two Cisco Unified Border Elements (Cisco UBEs). Some options may be used more than once.

                          Reveal Solution  Discussion  0

                          Correct Answer:


                          Explanation:

                          The H.323 setup is suspended before the destination phone, triggered by the H.225 alerting message, starts ringing. The RSVP reservation is made in both directions because a voice call requires a two-way speech path and therefore bandwidth in both directions. The terminating gateway ultimately makes the CAC decision based on whether or not both reservations succeed. At that point the H.323 state machine continues either with an H.225 Alerting/Connect (the call is allowed and proceeds), or with an H.225 Reject/Release (call is denied). The RSVP reservation is in place by the time the destination phone starts ringing and the caller hears ringback.

                          http://www.cisco.com/en/US/docs/ios/12_1t/12_1t5/feature/guide/dt4trsvp.html

                          Which is a function of RTP?

                          • A. replay protection
                          • B. encryption
                          • C. call multiplexing
                          • D. payload identification
                          Reveal Solution  Discussion  0

                          Correct Answer: D  πŸ—³οΈ

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