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Cisco Voice Over IP Sample Questions:

1. In the VoIP network above, which protocol provides the necessary sequence numbers so voice packets originating at R1 are played in the correct order at R5?

A) TCP
B) CRTP
C) RTCP
D) UDP
E) RTP

2. You are working with a potential customer that would like to integrate its existing PBX telephone system into its IP network. The accompanying figure shows that the customer has two offices that need to be connected to the IP network so that the customer can exchange telephone calls without using the PSTN. Both PBXs use Wink-Start signaling.
Which signaling type will allow you to support the customer?

A) FXO
B) QSIG
C) T-CCS
D) E&M
E) CAS
F) CCS

3. 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) answer-mode
B) trunk
C) PLAR
D) tie-line

4. You have a customer that is interested in determining the number of VoIP calls their Frame Relay WAN links can support. Each of their Frame Relay WAN links has 84 kbps of bandwidth available outside all other applications and overhead. How many G.729 calls using the 8 kbps codec and 20 byte sample size can be supported?

A) 2
B) 4
C) 1
D) 3

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

Solutions: