Convergence Technologies Professional

• Exam Number/Code : tt0-101
• Exam Name : Convergence Technologies Professional
• Questions and Answers : 130 Q&As

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PrepKing.com Cisco CTP tt0-101 Sample Questions
1. 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
2. Which media protocol is commonly used for Voice over IP (VoIP) solutions?
A. IMP
B. RTMP
C. MGCP
D. ICMP
Answer: C
3. 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
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
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Answer: A
5. 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
6. 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
7. 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
8. 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
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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
9. What is a function of a gateway in a converged network?
A. Provides Quality of Service (QoS) to converged networks
B. Provides admission translation and address control between IP endpoints
C. Manages calls between three or more endpoints to facilitate multipoint conferencing
D. Performs call setup and address translation between circuit-switched and packet-switched networks
Answer: D
10. Which International Telecommunication Union (ITU) G Series standard defines PCM voice coding at 64
Kbps?
A. G.711
B. G.726
C. G.728
D. G.729
Answer: A
11. Which is a variable delay component in packet-voice networks?
A. Routing-queuing delay
B. Bit-serialization delay
C. End-point processing delay
D. Encoding and compression delay
Answer: A
12. When a technician connects a North American T1 trunk to a European E1 trunk using a conversion
device, which of the following will result?
A. No connection can be made between E1 and T1.
B. No more than 80 percent of the E1 trunk can be used.
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C. The connection will be transparent to the technician.
D. No less than 80 percent of the T1 can be used or the connection will fail.
Answer: B
13. A company has complained that its voice quality is poor and would like to switch the codec used by its
on-premise Voice over IP (VoIP) gateway from G.723.1 to G.711. How will changing the customer’s
gateway to G.711 impact the overall bandwidth consumption?
A. Has no effect on bandwidth consumption, but will increase latency
B. Has no effect on bandwidth consumption, but will reduce jitter
C. Decreases the bandwidth consumption of each call to 8 Kbps (plus any overhead)
D. Increases the bandwidth consumption of each call to 64 Kbps (plus any overhead)
Answer: D
14. Which standards body is responsible for publishing the Requests For Comments (RFCs) that establish
TCP/IP specifications?
A. Internet Engineering Task Force (IETF)
B. International Telecommunication Union (ITU)
C. Institute of Electrical and Electronics Engineers (IEEE)
D. Internet Corporation for Assigned Names and Numbers (ICANN)
Answer: A
15. Through troubleshooting, a technician determines that there is a degraded clocking source on a
customer’s wide area network (WAN). Which term would that troubleshooter use to describe this situation?
A. Wander
B. Jitter
C. Latency
D. Attenuation
Answer: A
16. Which of the following Quality of Service (QoS) techniques uses the precedence bits in the IP header?
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A. RSVP
B. 802.1p
C. IntServ
D. DiffServ
Answer: D
17. During the call setup phase, call setup information is transmitted as non ASCII-based digital information
to a gatekeeper, while the media stream is transmitted directly from endpoint to endpoint. Which of the
following protocols does this describe?
A. SIP
B. Q.931
C. H.323
D. H.320
Answer: C
18. Which result will occur if the Adaptive Differential Pulse Code Modulation (ADPCM) is reduced from 32
Kbps to 16 Kbps?
A. Voice quality degrades as compression increases.
B. Voice quality improves as compression increases.
C. Voice quality degrades as compression decreases.
D. Voice quality is unaffected by compression rates.
Answer: A
19. A customer is experiencing sporadic problems with clicking during conversations, poor quality on fax
transmissions, and modems failing to connect. Which of the following is the most likely cause?
A. The T1 clock reference is incorrect.
B. The frame relay network is congested.
C. The channels have been provisioned incorrectly.
D. The D channel signaling information is incorrect.
Answer: A
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20. Which of the following is an international standard for the electrical interface between Data Terminal
Equipment (DTE) and Data Communications Equipment (DCE)?
A. V.24
B. DB25
C. RJ-11
D. 802.11b
Answer: A
21. A customer has two T3 lines and wants to provide for additional bandwidth. What is the minimum
Optical Carrier level that should be selected to replace them with a single circuit?
A. OC1
B. OC3
C. OC12
D. OC48
Answer: B
22. What is the result of attenuation?
A. Echo
B. Jitter
C. Signal strength increases
D. Signal strength decreases
Answer: D
23. Teflon-coated (plenum) cable is required or recommended in which of the following circumstances?
A. Outside plant cabling
B. Cabling through conduit
C. Cabling in a return-air environment
D. Riser cabling from the main distribution frame (MDF) to an intermediate distribution frame (IDF)
Answer: C
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24. ISDN uses which of the following to identify the called number?
A. DTMF tones
B. Rotary pulses
C. Call setup message
D. A and B signaling bits
Answer: C
25. What is the function of a hybrid, and what type of analog audio transmission impairment is associated
with it?
A. It performs 2-wire/4-wire conversion and causes echo.
B. It performs analog/digital conversion and causes loss.
C. It performs 2-wire/4-wire conversion and causes noise.
D. It performs mu-law/A-law conversion and causes distortion.
Answer: A
26. Off Premise Extension (OPX) circuits use which of the following signaling types to indicate off-hook
status?
A. Wink-start signaling
B. Loop-start signaling
C. Ring-start signaling
D. Ground-start signaling
Answer: B
27. To avoid glare, which type of interface is used?
A. OPX
B. POTS
C. Loop start
D. Ground start
Answer: D
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28. Which of the following is the correct application of an FXO or an FXS interface?
A. The FXO interface connects to a CSU/DSU.
B. The FXS interface connects to a telephone.
C. The FXO interface connects to a telephone.
D. The FXS interface connects to a central office.
Answer: B
29. What must be accomplished to draw dial tone on either a loop-start analog line or a ground-start analog
trunk?
A. Short tip and ring on a loop-start line, and short tip to ground on a ground-start trunk
B. Short tip and ring on a loop-start line, and short ring to ground on a ground-start trunk
C. Short ring to ground on a loop-start line, and short tip and ring on a ground-start trunk
D. Short ring to ground on a loop-start line, and short tip to ground on a ground-start trunk
Answer: B
30. Which of the following is the best grounding point for the external ground of an AC-powered PBX
containing ground start trunks?
A. Building i-beam resting on the ground
B. Third-wire ground from the PBX AC source
C. Cold-water PVC pipe going into the ground
D. Steel rod driven six feet into the ground
Answer: D
31. A customer reports that the PBX undergoes resets several times a day. A faulty power supply is
suspected to be the cause of the problem because its power LEDs are fluttering. Which troubleshooting
tool should be used to verify these suspicions?
A. T-BERD
B. Volt meter
C. Continuity tester

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