Cisco 642-432 Questions & Answers - in .pdf
- Total Q&A: 72
- Update: Sep 06, 2026
- Price: $49.99
- Vendor: Cisco
- Exam Code: 642-432
- Exam Name: Cisco Voice Over IP
- Features:
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- Complete Cisco Recommended Syllabus.
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- Exact Cisco 642-432 Exam Questions with Correct Answers, verified by Experts with years of Experience in IT Field.
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Cisco 642-432 Exam Syllabus Topics:
| Section | Weight | Objectives |
| Gatekeepers and Advanced Features | 15% | - H.323 gatekeeper functions
- Call admission control
- Connecting to service providers/ITSP
|
| Implementing VoIP Gateways | 25% | - Gateway configuration and troubleshooting
- H.323 and SIP gateway concepts
- MGCP gateway operation
|
| Introduction to Voice over IP | 15% | - Characteristics of VoIP networks
- Voice encoding and compression (G.711, G.729, etc.)
- Voice quality and QoS fundamentals
|
| Voice Quality and QoS | 5% | - Delay, jitter, packet loss
- QoS mechanisms for VoIP
|
| Configuring Voice Ports | 20% | - Signaling types: Loop Start, Ground Start, E&M
- Voice port configuration and verification
- Analog and digital voice ports
|
| Dial Plan Implementation | 20% | - Digit manipulation and translation rules
- Path selection and call routing
- Dial peers and call legs
|
Cisco Voice Over IP Sample Questions:
Question #1
In T1 CAS, where are the signaling states and control features carried for Super Frame robbed-bit signaling?
A. 6th, 12th, 18th, and 24th frame
B. 6th and 12th frame
C. the first and sixteenth time slot
D. the first and seventeenth time slot
Question #2
What does a gateway router match to a dialed number when setting up a VoIP call?
A. call leg
B. IP route
C. session target
D. destination pattern
Question #3
Refer to the exhibit. What is the minimum WAN bandwidth required to support three simultaneous VoIP calls in this network?

A. 247,200 bps
B. 19,200 bps
C. 79,200 bps
D. 51,600 bps
Question #4
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 an in-band signaling type.
Which signaling type will allow you to support your customer?

A. QSIG
B. FXO
C. E&M
D. CAS
E. T-CCS
F. CCS
Question #5
Which statement is true about only out-of-band signaling?
A. Signaling bits are sent in a special order in a dedicated signaling frame.
B. All voice packets carry their own signaling.
C. A signaling bit is robbed from each frame.
D. All signaling is directly associated with its corresponding voice frame.
Solutions:
Question #1 Answer: B | Question #2 Answer: D | Question #3 Answer: C | Question #4 Answer: D | Question #5 Answer: A |
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