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Exam : Telecommunications
　　　　　　　　　Industry Association
　　　　　　　　　TT0-101
Title : convergence technologies professional

1. Which media protocol is commonly used for Voice over IP (VoIP) solutions?
A. IMP
B. RTMP
C. MGCP
D. ICMP
Answer: C

2. Which of the following is a common characteristic of circuit-switched networks?
A. A call uses multiple circuits, releasing them during periods of silence for maximum efficiency.
B. A call has exclusive use of the entire circuit for the duration of the call but is inherently expensive.
C. A call can be completed without the need for any signaling because it uses PSTN circuits instead of TCP/IP.
D. A call has a very robust set of Quality of Service (QoS) options that allows it to overcome congestion and latency problems.
Answer: B

3. Which Quality of Service (QoS) technology is used by applications to signal QoS requirements to the network?
A. DSCP
B. RSVP
C. 802.1P
D. IP Precedence
Answer: B

4. What is the function of Quality of Service (QoS) in packet-voice networks?
A. Applies differential routing to voice packets
B. Improves encoding performance for voice packets
C. Reduces serialization and propagation delay to voice packets
D. Increases the amount of available bandwidth of voice packets
Answer: A

5. Users are reporting problems with voice delays on telephone calls on the corporate Voice over IP (VoIP) network. Which of the following is a possible cause of this problem?
A. Large data packets are causing the voice packets to exceed their delay budget.
B. Echo cancellation has been enabled on the voice coders without configuring phase shifting.
C. The destination number is not contained in the local dial plan, forcing the gateway to do a recursive number lookup.
D. The voice codec is unable to properly compress the voice stream into packets because the sampling rate has been set too high.
Answer: A

6. What is the function of a gatekeeper in a converged network?
A. Provides network connectivity for legacy systems
B. Provides admission control and address translation between endpoints
C. Manages calls between three or more endpoints to facilitate multipoint conferencing
D. Performs call setup and address translation between packet-switched and circuit-switched networks
Answer: B

7. Using a T1 circuit to connect a North American company to its European branch, a technician may choose an E1 carrier trunk. How many total and usable data and/or voice channels can be configured?
A. 23 channels
B. 24 channels
C. 30 channels
D. 32 channels
Answer: B

8. Which of the following International Telecommunication Union (ITU) recommendations defines the standard for store-and-forward fax transmission over IP networks?
A. T.37
B. S.47
C. V.235
D. Q.931
Answer: A