Prepare with Cisco 642-432 exam practice material, pass for sure
Updated: Sep 08, 2026
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Cisco 642-432 Exam Overview:
| Certification Vendor: | Cisco |
|---|---|
| Exam Name: | Cisco Voice Over IP (CVOICE v6.0) |
| Exam Number: | 642-432 |
| Real Exam Qty: | 72 |
| Passing Score: | Approx. 734/1000 (not officially published) |
| Available Languages: | English |
| Related Certifications: | CCNP Voice Cisco Collaboration |
| Exam Price: | $150–$200 USD (historical) |
| Exam Duration: | 90 minutes |
| Certificate Validity Period: | 3 years |
| Exam Format: | Scenario-based, Multiple Choice, Simulation |
| Recommended Training: | Cisco CVOICE v6.0 Official Course |
| Exam Registration: | Pearson VUE |
| Sample Questions: | Cisco 642-432 Sample Questions |
| Exam Way: | Onsite at Pearson VUE authorized testing centers; **RETIRED** (replaced by 642-436, later 642-437) |
| Pre Condition: | Valid CCNA certification or equivalent networking knowledge; familiarity with Cisco IOS and PSTN concepts |
| Official Syllabus URL: | https://www.cisco.com/go/certifications |
Cisco 642-432 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Implementing VoIP Gateways | 25% | - Gateway configuration and troubleshooting - H.323 and SIP gateway concepts - MGCP gateway operation |
| Voice Quality and QoS | 5% | - QoS mechanisms for VoIP - Delay, jitter, packet loss |
| Gatekeepers and Advanced Features | 15% | - Connecting to service providers/ITSP - Call admission control - H.323 gatekeeper functions |
| Dial Plan Implementation | 20% | - Path selection and call routing - Dial peers and call legs - Digit manipulation and translation rules |
| Configuring Voice Ports | 20% | - Signaling types: Loop Start, Ground Start, E&M - Analog and digital voice ports - Voice port configuration and verification |
| Introduction to Voice over IP | 15% | - Voice encoding and compression (G.711, G.729, etc.) - Voice quality and QoS fundamentals - Characteristics of VoIP networks |
Cisco Voice Over IP Sample Questions:
Question 1
Which two codecs are required on a Gateway to support CNG and VAD across a WAN link without major impact to call quality and bandwidth consumption? (Choose two.)
A. G.729ab
B. G.729
C. G.729b
D. G.723
E. G.729a
Question 2
You are working with a potential customer that would like to integrate its existing PBX telephone system into its IP network. The accompanying figure shows that the customer has two offices that need to be connected to the IP network so that the customer can exchange telephone calls without using the PSTN. Both PBXs use Wink-Start signaling.
Which signaling type will allow you to support the customer?
A. T-CCS
B. QSIG
C. FXO
D. CAS
E. E&M
F. CCS
Question 3
In the connection between a Cisco router and an E&M port on a PBX, which side is generally the Cisco side?
A. trunk circuit
B. loop start
C. switch port
D. signaling unit
Question 4
The following are the original dial peer configurations for routers R1 and R2:
R1: dial-peer voice 20 voip destination-pattern 408....... session target ipv4:192.168.2.254 !
R2: dial-peer voice 21 pots destination-pattern 4085554321 port 1/0/1 !
Which phones can call to the other?
A. Only Phone A can call Phone B.
B. Neither phone can call the other.
C. Only Phone B can call Phone A.
D. Both phones can call each other.
Question 5
What is the function of a SIP registrar server?
A. acquires endpoint addresses
B. routes service requests
C. resolves active endpoint addresses
D. resolves text addresses to IP addresses
Solutions:
| Question 1 Answer: A,C | Question 2 Answer: E | Question 3 Answer: D | Question 4 Answer: A | Question 5 Answer: A |
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