Computer Networking – Multimedia and Quality of Service MCQs

1. In __________ compression, the integrity of the data _____ preserved because compression and decompression algorithms are exact inverses of each other.

2. Which of the following compression method is not lossless?

3. Lempel Ziv Welch (LZW) method is an example of ______________.

4. ______________ assigns shorter codes to symbols that occur more frequently and longer codes to those that occur less frequently.

5. In arithmetic coding the entire message is mapped to a real number in the interval _________.

6. Which of the following compression methods is considered as predictive coding?

7. In ________, instead of quantizing each sample separately, the differences are quantized.

8. The adaptive DM (ADM) is used to solve the problem of _________ in DM.

9. _______ can achieve a high level of compression and is normally used in military for compressing speech. The synthesized speech, though intelligible, lacks naturalness and quality to identify the speaker.

10. __________ coding is based on the science of psychoacoustics, which is the study of how people perceive sound.

11. Which step of transform coding used in multimedia is lossy?

12. Since the square matrix that represents the DCT coefficient is an ____________ matrix, inverse and transpose are the same.

13. ____________ is used to compress images.

14. The first phase of JPEG compression process is ___________.

15. The second phase of JPEG compression process is ___________.

16. The third phase of JPEG is ___________.

17. ____________ is used to compress video.

18. In MPEG method, the ________ compression of each frame is done with JPEG; redundant frames are removed during _______ compression.

19. ________ audio/video refers to on-demand requests for compressed audio/video files.

20. ___________ audio/video refers to the broadcasting of radio and TV programs through the Internet.

21. _________ audio/video refers to the use of the Internet for interactive audio/video applications.

22. A ________ buffer is required for real-time traffic.

23. To establish time relationship and order of the packets, a real-time traffic needs __________ on each packet

24. __________ means changing the encoding of a payload to a lower quality to match the bandwidth of the receiving network.

25. __________ means combining several streams of traffic into one stream.

26. To makeup for the lost and corrupt packets, the real-time traffic normally ____________.

27. A real-time video performance lasts 10 min. If there is jitter in the system, the viewer spends _______ minutes watching the performance.

28. A _______ shows the time a packet was produced relative to the first or previous packet.

29. _______ are used to number the packets of a real-time transmission.

30. A _______ adds signals from different sources to create a single composite signal.

31. A _______ changes the format of a high-bandwidth video signal to a lower quality narrow-bandwidth signal.

32. _____ is an application layer protocol that establishes, manages, and terminates a multimedia session.

33. _____ is a standard designed by ITU to allow telephones on the public telephone network to talk to computers connected to the Internet.

34. _____ is not suitable for interactive multimedia traffic because we cannot allow retransmission of packets.

35. __________ is the protocol designed to handle real-time traffic on the Internet.

36. ___________ is a protocol for controlling the flow and quality of data in association with RTP.

37. An RTP packet is encapsulated in _______.

38. Stream Control Transmission Protocol (SCTP) is a new _____________ protocol.

39. SCTP allows __________ service in each association.

40. SCTP association allows _____________ for each end.

41. In SCTP, a data chunk is numbered using ________.

42. To distinguish between different streams, SCTP uses ___________.

43. To distinguish between different data chunks belonging to the same stream, SCTP uses ___________.

44. TCP has ____________; SCTP has ____________.

45. The control information in SCTP are carried in the ________.

46. In SCTP, acknowledgment numbers are used to acknowledge _____________.

47. In an SCTP packet, control chunks come ___________ data chunks.

48. A connection in SCTP is called a(n) ____________.

49. Which of the following is not a characteristic attributed to a data flow?

50. Which of the following method is used to improve QoS?

51. Which of the following method is a scheduling technique?

52. A _______ algorithm is a policing technique that shapes bursty traffic into fixed-rate traffic by averaging the data rate, but it does not give credit to the user during idle periods.

53. A _______ algorithm is a policing technique that allows bursty traffic at a regulated maximum rate and give some credits to the user during idle periods.

54. Which QoS model depends heavily on resource reservation?.

55. Integrated Services is a _______________ QoS model designed for IP.

56. Differentiated Services is a _______________ QoS model designed for IP.

57. Guaranteed services in IntServ model are required for __________ application

58. Controlled-Load services in IntServ model is designed for applications that ______________________.

59. IntServ model is ________________________________________

60. To implement _________, the DS node uses _________________ such as meters, markers, shapers, and droppers