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Exam : CTP TT0-201
Title : Convergence Technologies Professional 2007

1. Which of the following is responsible for ensuring that incoming customer calls are properly queued according to the order in which they were received?
A. SIP proxy
B. Edge router
C. Automatic Call Distributor (ACD)
D. Analog Telephone Adapter (ATA)
Answer: C

2. Which device specializes in admitting calls into a network, manages session traffic, and helps traffic traverse a firewall?
A. Layer 3 switch
B. Multipoint Control Unit (MCU)
C. IP Multimedia Subsystem (IMS)
D. Session Border Controller (SBC)
Answer: D

3. When calculating bandwidth consumption, which of the following factors should you consider?
A. Reference clocking settings, ESP mode, and BOOTP settings
B. Codec, Ethernet overhead, and silence suppression (if supported)
C. Codec, BOOTP settings, and Maximum Transmission Unit (MTU) settings
D. Maximum Transmission Unit (MTU) settings and NAPTR records
Answer: B

4. Which of the following codecs specifies a voice stream operating at 8 Kbps, is less complex than G.729, and yet obtains roughly the same Mean Opinion Score (MOS)?
A. G.711
B. G.723
C. G.726
D. G.729a
Answer: D

5. Which of the following are common elements of a Call Detail Record (CDR)?
A. Conversation time, QoS results, and caller
B. Caller, duration, and amount billed for each call
C. Amount billed for each call, IP address of calling host, and QoS results
D. IP address of calling host, duration, and Mean Opinion Score (MOS)
Answer: B

6. Your team has determined that the voice quality of a video transmission is too low. What Mean Opinion Score (MOS) would indicate a low level of voice quality?
A. 2.5
B. 3.6
C. 45
D. 77
Answer: A

7. Which of the following can cause the most significant interference with WiFi communications?
A. Ethernet hubs
B. Television equipment
C. 2.4-GHz cordless phones
D. 900-MHz cordless phones
Answer: C

8. Which of the following is most likely to cause packet loss and clicking during a phone call?
A. Impedance mismatch
B. Improper reference clocking
C. Improper equipment grounding
D. Packets arriving out of order
Answer: B

9. Which of the following best describes differences between DiffServ and 802.1p?
A. DiffServ uses Layer 3 devices for QoS, whereas 802.1p uses Layer 2 devices for QoS.
B. DiffServ requires an Application Layer Gateway (ALG), whereas 802.1p requires a Layer 3 switch.
C. DiffServ uses Layer 2 devices for QoS, whereas 802.1p uses Layer 3 devices for QoS.
D. Microsoft’s Packet Scheduler uses DiffServ at Layer 7 of the OSI, whereas Cisco products use 802.1p at Layer 4 of the OSI.
Answer: A

10. In which of the following layers of the OSI/RM would you find Session Initiation Protocol (SIP)?
A. Network layer
B. Physical layer
C. Session layer
D. Application layer
Answer: D

11. You want to connect a PBX made by one manufacturer to another PBX made by a different manufacturer. You need to ensure that these interconnected PBXs will retain their basic and supplementary services. Which protocol was originally designed to allow this?
A. H.225
B. H.450
C. Q.932
D. QSIG
Answer: D

12. Receiving a fax as an e-mail attachment is an example of which technology?
A. Circuit-switched faxing, as defined by T.30
B. Multipoint application sharing, as defined by T.128
C. Store-and-forward faxing, as defined by T.37
D. Multipoint still image exchange, as defined by T.127
Answer: C