Instant Download Cisco : 642-432 Questions & Answers as PDF & Test Engine
Updated: Sep 05, 2026
No. of Questions: 72 Questions & Answers with Testing Engine
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Cisco 642-432 Exam Syllabus Topics:
| Section | Weight | Objectives |
|---|---|---|
| Topic 1: Voice Quality and QoS | 5% | - Delay, jitter, packet loss - QoS mechanisms for VoIP |
| Topic 2: Introduction to Voice over IP | 15% | - Voice encoding and compression (G.711, G.729, etc.) - Voice quality and QoS fundamentals - Characteristics of VoIP networks |
| Topic 3: Dial Plan Implementation | 20% | - Path selection and call routing - Digit manipulation and translation rules - Dial peers and call legs |
| Topic 4: Implementing VoIP Gateways | 25% | - Gateway configuration and troubleshooting - MGCP gateway operation - H.323 and SIP gateway concepts |
| Topic 5: Gatekeepers and Advanced Features | 15% | - H.323 gatekeeper functions - Call admission control - Connecting to service providers/ITSP |
| Topic 6: Configuring Voice Ports | 20% | - Analog and digital voice ports - Signaling types: Loop Start, Ground Start, E&M - Voice port configuration and verification |
Cisco Voice Over IP Sample Questions:
In T1 CAS, where are the signaling states and control features carried for Super Frame robbed-bit signaling?
- A. 6th and 12th frame
- B. 6th, 12th, 18th, and 24th frame
- C. the first and sixteenth time slot
- D. the first and seventeenth time slot
Which dial plan characteristic shows the most obvious improvement by dropping a number translation step?
- A. scalability
- B. hierarchical design
- C. availability
- D. post-dial delay
How do a-law and mu-law handle issues with signal-to-noise ratios related to the measure of amplitude?
- A. Increase code points at higher frequencies.
- B. Use smaller step functions at lower amplitudes.
- C. Increase code points at lower amplitudes.
- D. Use smaller step functions at higher frequencies.
Which device is used to allow an H.323 stream to transit a firewall?
- A. gateway
- B. gatekeeper
- C. proxy
- D. MCU
You are meeting with a customer that has deployed IP telephony at their headquarters
location. They would like to roll out IP telephony to their regional office as well. They are now using the G.711 codec at headquarters. They want to be able to maximize the number of calls carried without impacting voice quality or forcing a WAN upgrade. Which codec would be appropriate for their WAN?
- A. G.729B
- B. G.726
- C. G.723.1
- D. G.711
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