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CCNA Voice - 3

Subjects : cisco, it-skills, ccna
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. It has a large header of __ bytes - Size of headers IP/RTP/UDP






2. Bob@nextdoorneighbor.com is a __ entry but coverts then to an __ address






3. On a voip link What is the max packet loss






4. PCM and ADPCM are examples of __ __






5. __ Kbps low-delay variation of CELP voice compression 16 kbps






6. __ __ conceals interarrival packet delay variation.






7. __by default - sends two 10-ms G.729 speech frames in every packet - If you send more __ frames you put in a packet the fewer ___ you require but if you loose a packet the more __ you lose






8. Time of day of highest calls on circuit focus those on the __






9. What do you use to compress RTP header to 2 or 4 bytes






10. Satellite transmission takes approximately __ ms for a transmission to reach the satellite and another __ ms for it to come back down to Earth. This results in a total delay of __ ms.






11. Who scored highest in the MOS






12. Simplify the router - use H.323 gatekeeper or voice managers to avoid __ __






13. If a packet is lost What is replayed? packet loss is common in data networks but not in __






14. __ recommends no more than __ms delay one-way transmission






15. __ is not wasting __ when there is no sound to transmit. At least __ % is wasted






16. What are 3 things you can do if they want to implement a corporate dial plan






17. How many times can a digital to analog conversion in my network and PSTN total network happen - __ speech is less robust conversion






18. RTCP provides support for real-time conferencing of __ of any size within an Internet - does not send __ - offers __and supports __ media streams






19. In an unmanaged - congested network - ___delay can add up to two seconds of delay (or result in the packet being dropped). This lengthy period of delay is___ in almost any voice network. delay)






20. These techniques can be grouped together generally as __ __ and include variations such as linear predictive coding (LPC) - code excited linear prediction compression (CELP) - and multipulse - multilevel quantization (MP-MLQ).






21. Is the amount of time it takes to actually place a bit or byte onto an interface. Its influence on delay is relatively minimal.






22. Echo cancellers are limited by the total amount of time they wait for the reflected speech to be received __ __. A good time to configure is __ms






23. When companies merge make sure you configure the __ __






24. RTP uses the __ __ to determine whether the packets are arriving in order - and it uses the __ __ information to determine the interarrival packet time (jitter).






25. Propagation delay in conjuction with handeling delay can cause noticeable






26. __ __ replays the last packet received






27. ___ ___ are used within Cisco IOS Software to determine what level of ___ - if any - exists within the network.






28. VAD problems in determining when speech __ and __ - and in distinguishing speech from __ __. Its also known as __ __ __ __






29. Caused by the length a signal must travel via light in fiber or electrical impulse in copper-based networks.






30. __ __ occurs when you have more than one compression/decompression cycle for each phone call and Voice degradation occurs






31. __ the 64 Kbps __ voice coding technique - This is used for the digital voice delivery in the __ or __






32. This adaptation of jitter buffer __ is effective in compensating for delays.






33. Preferred codec for skype - PC to phone apps - A free speech codec suitable for robust voice communication over IP.






34. Proxy server is not required in an __ based system






35. Another compression method used often is ____ . A commonly used instance of this is ITU-T __ - which encodes using 4-bit samples - giving a transmission rate of __ Kbps.






36. RTP consists of a __ __ and a control part the called __






37. Is the variation of packet interarrival time.






38. You hear your own voice in the background ( 4wire)






39. How does G.729 header go __/__/__






40. __ is an _ measurement of voice quality and the __ measures the voice






41. The difference between when the packet is expected and when it is actually received is __. - exists only in __ ___ networks






42. __ builds in some reliability to the connectionless __ protocol - enables reliability with out using the overhead of __ - what protocol send multiples of the same packet __






43. __ Describes a compression technique that you can use to compress ___or other __ signal components of multimedia service at a low bit rate - MP-MLQ provides greater quality at __ Kbps - CELP provides flexibility at __Kbps






44. The jitter buffer found within Cisco IOS ___ is considered a __ queue. This queue can grow or shrink exponentially depending on the interarrival time of the __ packets.






45. __ describes __ coding at __ - __ - __ and __ Kbps; you also can interchange ADPCM voice between packet voice and public phone or PBX networks






46. Using G.729 - just __ conversions from D/A cause the MOS score to decrease rapidly but __ is less resilient






47. A __ can trick the human ear into perceiving a higher-quality voice - but a __ cannot be tricked.






48. __ is a __test given to listeners. The listeners give each sample of speech material a rating of __ (bad) to __ (excellent)






49. PSQM was developed to 'hear' impairments caused by __ and __ and not packet loss or jitter






50. To reduce the overall ___ overhead introduced by the 54-byte header - multiple voice samples can be packed into a single Ethernet frame to transmit. Although this can increase the voice ___ - increasing this count can improve the overall voice___ - e






Can you answer 50 questions in 15 minutes?



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