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Cisco Voice Over IP Sample Questions:

1. Which device is used to allow an H.323 stream to transit a firewall?

A) proxy
B) gateway
C) MCU
D) gatekeeper

2. Refer to the exhibit. Will these delays meet the G.114 recommendation for one-way delay?

A) No, they will not meet the recommendation for general network purposes.
B) Yes, they will meet the recommendation, provided the administrators understand the implications.
C) Yes, they will meet the recommendation for most user applications.
D) No, but they will be acceptable for time-sensitive transaction processing.

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

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

4. In North America, which E&M signaling type is used most often for geographically separated equipment?

A) Type V
B) Type III
C) Type I
D) Type IV
E) Type II

5. You are working with your customer in their lab to test the effect of jitter on voice quality. You have set the maximum playout delay to 40 ms on the voice enabled routers. What will be the impact on voice quality if after severe congestion the playout buffer empties and the source sends packets to the buffer faster than they are leaving?

A) The jitter buffer will adapt to the faster-arriving packets by expanding the buffer size.
B) After the jitter buffer fills up, subsequent packets are discarded.
C) There will be no noticeable drop in quality.
D) The jitter buffer will speed up delivery of packets to the DSP so that packets are not dropped.

Solutions: