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Cisco Voice Over IP Sample Questions:

1. 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) proxy
C) user agent client
D) redirect
E) registrar

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

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

3. Refer to the exhibit.
Lighthorse Equine Management would like to investigate converging voice and data on their existing T1 Frame Relay WAN link between New York and Atlanta. Currently the following list of applications are consuming no more bandwidth than what is listed on this segment of the network.
T1 link 1536 kbps
e-mail 75 kbps
internet 200 kbps
Oracle 500 kbps
FTP 250 kbps
Total 1025 kbps
The customer has allocated 25% of the WAN link for routing updates and other overhead. They would like to increase the number of samples encapsulated in each PDU to 40 ms. You have calculated 6 bytes of overhead for Frame Relay, no cRTP, and the use of the
G.711 codec.
How many simultaneous calls could be placed on this link?

A) 2 calls
B) 1 call
C) no more than 20 calls
D) no more than 10 calls
E) no more than 5 calls
F) 0 calls

4. 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.723.1
B) G.711
C) G.726
D) G.729B

5. Which is the best way to achieve a scalable dial plan?

A) hunt groups
B) single number prefixing
C) group numbers for a particular area
D) variable number of extension digits

Solutions: