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Cisco Voice Over IP Sample Questions:

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

2. Refer to the exhibit.

Your customer wants to converge the existing PBX network with the IP network.
The three remote offices have various types of PBXs. The customer is using a combination of tie-lines and trunks to connect the PBXs today.
Which kind of connection should be implemented to allow calls to be placed from 201-5551000 to 727-555-1000 so that when the call is completed, network resources are returned for other uses?

A) PLAR
B) answer-mode
C) tie-line
D) trunk

3. In a VoIP environment when speech samples are framed every 20 ms, a payload of 20 bytes is generated. Assuming a total packet length of 60 bytes, what is the length of the packet header if cRTP is deployed without redundancy checks?

A) 1 byte
B) 4 bytes
C) 20 bytes
D) 40 bytes
E) 3 bytes
F) 2 bytes

4. 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) 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
C) does not release call path setup
D) 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
E) after the call agent has been notified of an event and has instructed the source residential gateway to create a connection

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

Solutions: