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Cisco Voice Over IP Sample Questions:

1. Refer to the exhibit. Users are not able to complete a call from 678-555-1212 to 770-5551111. What is the correct diagnosis for the problem?

A) incorrect destination-pattern in Router 1
B) incorrect session-target statement in Router 2
C) incorrect dial-peer statement in Router 1
D) incorrect port statement in Router 1 pots dial peer

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

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

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

4. One voice packet is lost between Phone A and Phone B.
What will be the result to the listener?

A) The call is terminated.
B) The listener will hear the audio normally. Packet loss concealment will make the loss inaudible.
C) The listener will hear the audio out of order when the lost packet is retransmitted.
D) The listener will experience a gap in the received audio stream.

5. 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.723.1
D) G.726

Solutions: