Cisco 642-432 : Cisco Voice Over IP

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Cisco 642-432 Exam Syllabus Topics:

Cisco Voice Over IP Sample Questions:

1. In an effort to consume less bandwidth across the WAN, the decision was made at Acme Chemical Company to change the voice packet size. They changed from two voice frames per packet to one voice frame per packet. What effect did this have on Acme's voice traffic?

A) Per call bandwidth consumption decreased and end-to-end delay increased.
B) Per call bandwidth consumption decreased and end-to-end delay decreased.
C) There was no effect on voice traffic.
D) Per call bandwidth consumption increased and end-to-end delay decreased.
E) Per call bandwidth consumption increased and end-to-end delay also increased.

2. How do a-law and mu-law handle issues with signal-to-noise ratios related to the measure of amplitude?

A) Use smaller step functions at lower amplitudes.
B) Increase code points at higher frequencies.
C) Use smaller step functions at higher frequencies.
D) Increase code points at lower amplitudes.

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 a proprietary signaling type.
Which signaling type will allow you to support your customer?

A) FXS
B) CAS
C) T-CCS
D) E&M
E) CCS
F) FXO

4. What are the three components in an MGCP environment? (Choose three.)

A) proxy server
B) gatekeeper
C) endpoint
D) gateway
E) call agent

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

Solutions: