642-432 Exam questions, 642-432 Braindumps, 642-432 Real Exams

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Exam Code: 642-432

Exam Name: Cisco Voice Over IP

Updated: May 30, 2026

Number: 72 Q&As with Testing Engine

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Exam IntroProduct ScreenshotsFAQ

Cisco Voice Over IP Sample Questions:

1. You have a customer that is interested in determining the number of VoIP calls their Frame Relay WAN links can support. Each of their Frame Relay WAN links has 84 kbps of bandwidth available outside all other applications and overhead. How many G.729 calls using the 8 kbps codec and 20 byte sample size can be supported?

A) 1
B) 2
C) 3
D) 4

2. 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.711
B) G.729B
C) G.726
D) G.723.1

3. 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) CAS
B) QSIG
C) E&M
D) FXO
E) CCS
F) T-CCS

4. What does a gateway router match to a dialed number when setting up a VoIP call?

A) call leg
B) destination pattern
C) IP route
D) session target

5. A 9 digit number must be dialed to reach numbers on the PSTN. What process makes sure that the first digit 9 is not transmitted as part of the called number?

A) digit masking
B) digit alternating
C) digit seizing
D) digit manipulation

Solutions:

Question # 1
Answer: C

Question # 2
Answer: B

Question # 3
Answer: A

Question # 4
Answer: B

Question # 5
Answer: D

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