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Cisco Voice Over IP Sample Questions:

1. Which option is true concerning the MGCP call agent?

A) monitors the quality of each call after setup
B) manages all aspects of the call and voice stream
C) provides only call signaling and call setup
D) acts only as a recorder of call details

2. How is CAS different on E1 and T1?

A) T1 uses the D channel for CAS signaling.
B) E1 uses robbed-bit signaling.
C) E1 CAS signaling is out-of-band while T1 is in-band.
D) T1 has more signaling channels.

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

4. One voice packet is lost between Phone A and Phone B.
What will be the result to the listener?

A) The call is terminated.
B) The listener will hear the audio out of order when the lost packet is retransmitted.
C) The listener will experience a gap in the received audio stream.
D) The listener will hear the audio normally. Packet loss concealment will make the loss inaudible.

5. What is the function of a SIP registrar server?

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

Solutions: