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Cisco Voice Over IP Sample Questions:

1. The illustration above shows the timing and order of arrival of voice packets at the end device. Each voice packet contains 20 ms of voice data. Assuming a play-out buffer of 20 ms, what will happen to voice packet number 3?

A) It will be played out in its proper location.
B) Immediately moved to the front of the play-out buffer.
C) It will be played out in the order it is received.
D) It will be dropped and treated as a lost packet.

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

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

3. A particular set of H.323 endpoints cannot resolve the IP address of destination endpoints.
What is the H.323 approved method to fix this problem?

A) Choose another signaling protocol.
B) Introduce a gatekeeper on the segment.
C) Hard code all IP addresses.
D) Build route tables in gateways on the segment.

4. DRAG DROP
Drop

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

Solutions: