Cisco Voice Over IP : 642-432

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Cisco Voice Over IP Sample Questions:

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

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

3. What is the function of a SIP location server?

A) routes service requests
B) acquires active endpoint addresses
C) resolves text addresses to IP addresses
D) resolves active endpoint addresses

4. Which statement is true about only out-of-band signaling?

A) Signaling bits are sent in a special order in a dedicated signaling frame.
B) All voice packets carry their own signaling.
C) All signaling is directly associated with its corresponding voice frame.
D) A signaling bit is robbed from each frame.

5. At what point does the MGCP call agent release the setup of the call path to the residential gateways?

A) after the call agent has been notified that an event occurred at the source residential gateway
B) does not release call path setup
C) after the call agent has sent a connection request to both the source and destination and has relayed a modify-connection request to the source so that the source and destination can set up the call path
D) after the call agent has been notified of an event and has instructed the source residential gateway to create a connection
E) after the call agent has forwarded session description protocol information to the destination from the source and has sent a modify connection to the destination and a create-connection request to the source

Solutions: