NETW 250 Week 8 Final Exam New

NETW 250 Week 8 Final Exam New

Author: Christine Farr


1. (TCO 1) ITU recommendation G. 711 is also referred to as _____ (Points : 5)
2. (TCO 1) What’s a typical amount of downtime associated with PSTN business services? (Points : 5)
3. (TCO 2) Which circuit-switched Private Branch Exchange (PBX) hardware allows internal phones and extensions to be connected to the PBX? (Points : 5)
4. (TCO 2) An end user of a(n) _____ uses line keys on the phone panel to select and access telephone company lines. (Points : 5)
5. (TCO 5) Which transport layer protocol is not used by voice packets in VoIP? (Points : 5)
6. (TCO 5) In the RTP header, _____ is used by the receiver to detect lost packets and to ensure that received packets are played back in proper order? (Points : 5)
7. (TCO 4) Which of the following audio codecs, in its original form, requires 64 Kbps of bandwidth? (Points : 5)
8. (TCO 4) Which of the following audio codecs, in its original form, requires the least amount of bandwidth? (Points : 5)
9. (TCO 5) Which of the following techniques help reduce VoIP bandwidth consumption? (Points : 5)
10. (TCO 3) Which of the following VoIP equipment is typically seen in a residential environment? (Points : 5)
11. (TCO 6) Which SIP method/response is typically generated to signal the end of a call session or dialog? (Points : 5)
12. (TCO 6) Which SIP method/request or response is shown below?
13. (TCO 6) In H.323 call signaling, _____ is used for terminals to exchange capabilities and preferences such as audio and video codecs during a call setup. (Points : 5)
14. (TCO 6) Which of the following is not a typical function of VoIP gateways? (Points : 5)
15. (TCO 7) Which of the following facts about Local Number Portability (LNP) is not correct? (Points : 5)
16. (TCO 7) Which of the following is a telephony feature that was made possible by VoIP? (Points : 5)
17. (TCO 8) What’s the name of the gateway interface/port that connects an analog phone? (Points : 5)
18. (TCO 8) Which of the following is typically required to connect SIP trunks to legacy PBXs and analog phones? (Points : 5)
19. (TCO 9) 200 seconds of total holding time during the Busy Hour generates a traffic load of _____ (Points : 5)
20. (TCO 9) Given that the targeted call blocking probability remains the same, which of the following PBX systems will support the least amount of traffic during the Busy Hour? (Points : 5)

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