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Cisco 642-432 Exam Syllabus Topics:

Cisco Voice Over IP Sample Questions:

1. You have been forwarded some questions by a prospective VoIP customer who would like to know the Cisco default sample size for the G.729 codec. What is it?

A) 10 ms
B) 30 ms
C) 40 ms
D) 20 ms

2. 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.723
B) G.729ab
C) G.729a
D) G.729b
E) G.729

3. Which type of signaling is DTMF?

A) route
B) informational
C) address
D) supervisory

4. To hide its identity when initiating calls, Phone B requests that Server B place its calls for it. What kind of device is Server B?

A) registrar
B) user agent client
C) user agent server
D) redirect
E) proxy

5. Refer to the exhibit. Your customer wants to converge voice and data on the existing T1 Frame Relay WAN link between New York and Atlanta. The customer has allocated 25 percent of the WAN link for routing updates and other overhead. You are using 6 bytes of overhead for Frame Relay, no cRTP, and the G.729 codec.
How many calls could be placed on this link?

A) three
B) four
C) five
D) seven
E) two
F) six

Solutions: