In this section of Data Communication and Networking – Multimedia MCQ (Multiple Choice) Based Questions and Answers ,it cover the below lists of topics.All the Multiple Choice Questions and Answers (MCQs) have been compiled from the book of Data Communication and Networking by The well known author behrouz forouzan.
This Section covers below lists of topics.
- Cryptography MCQs.
- Encryption MCQs.
- Decryption MCQs.
- Symmetric-key cryptography MCQs.
- public-key cryptography MCQs.
PRACTICE IT NOW TO SHARPEN YOUR CONCEPT AND KNOWLEDGE
1. We can divide audio and video services into _______ broad categories.
- three
- two
- four
- none of the above
A. three
2. ________ audio/video refers to on-demand requests for compressed audio/video files.
- Streaming live
- Streaming stored
- Interactive
- none of the above
B. Streaming stored
3. __________ audio/video refers to the broadcasting of radio and TV programs through the Internet.
- Interactive
- Streaming live
- Streaming stored
- none of the above
B. Streaming live
4. _________ audio/video refers to the use of the Internet for interactive audio/video applications.
- Interactive
- Streaming live
- Streaming stored
- none of the above
A. Interactive
5. According to the Nyquist theorem, we need to sample an analog signal ________times the highest frequency.
- three
- two
- four
- none of the above
B. two
6. In ________ encoding, the differences between the samples are encoded instead of encoding all the sampled values.
- predictive
- perceptual
- both a and b
- none of the above
A. predictive
7. ________ encoding is based on the science of psychoacoustics, which is the study of how people perceive sound
- Predictive
- Perceptual
- both a and b
- none of the above
B. Perceptual
8. ____________ is used to compress images.
- MPEG
- JPEG
- either a or b
- none of the above
B. JPEG
9. __________ is used to compress video.
- MPEG
- JPEG
- either a or b
- none of the above
A. MPEG
10. The first phase of JPEG is ___________
- DCT transformation
- quantization
- data compression
- none of the above
A. DCT transformation
11. The second phase of JPEG is ___________
- DCT transformation
- quantization
- data compression
- none of the above
B. quantization
12. The third phase of JPEG is ___________
- DCT transformation
- quantization
- data compression
- none of the above
C. data compression
13. Jitter is introduced in real-time data by the _______________
- error caused during transmission
- delay between packets
- both a and b
- none of the above
B. delay between packets
14. To prevent _________, we can timestamp the packets and separate the arrival time from the playback time.
- error
- jitter
- either a or b
- none of the above
B. jitter
15. A ________buffer is required for real-time traffic.
- playback
- reordering
- sorting
- none of the above
A. playback
16. A __________on each packet is required for real-time traffic
- timestamp
- sequence number
- both a and b
- none of the above
C. both a and b
17. Real-time traffic needs the support of ____________
- broadcasting
- multicasting
- both a and b
- none of the above
B. multicasting
18. __________ means changing the encoding of a payload to a lower quality to match the bandwidth of the receiving network.
- Translation
- Mixing
- both a and b
- none of the above
A. Translation
19. __________ means combining several streams of traffic into one stream
- Translation
- Mixing
- both a and b
- none of the above
B. Mixing
20. _________ is not suitable for interactive multimedia traffic because it retransmits packets in case of errors.
- UDP
- TCP
- both a and b
- none of the above
B. TCP
21. ________ is the protocol designed to handle real-time traffic on the Internet
- TCP
- UDP
- RTP
- none of the above
C. RTP
22. RTP uses a temporary even-numbered _______ port
- UDP
- TCP
- both a and b
- none of the above
A. UDP
23. ___________ is a protocol for controlling the flow and quality of data.
- RTP
- RTCP
- UDP
- none of the above
B. RTCP
24. RTCP uses an odd-numbered _______ port number that follows the port number selected for RTP
- UDP
- TCP
- both a and b
- none of the above
A. UDP
25. ___________ is an application protocol that establishes, manages, and terminates a multimedia session
- RIP
- SIP
- DIP
- none of the above
B. SIP
26. _______ is a standard to allow telephones on the public telephone network to talk to computers connected to the Internet
- SIP
- H.323
- Q.991
- none of the above
B. H.323
27. A real-time video performance lasts 10 min. If there is jitter in the system, the viewer spends _______ minutes watching the performance
- less than 10
- more than 10
- exactly 10
- none of the above
B. more than 10
28. A _______ shows the time a packet was produced relative to the first or previous packet.
- timestamp
- playback buffer
- sequence number
- none of the above
A. timestamp
29. _______ are used to number the packets of a real-time transmission
- Timestamps
- Playback buffers
- Sequence numbers
- none of the above
C. Sequence numbers
30. In a real-time video conference, data from the server is _______ to the client sites.
- unicast
- multicast
- broadcast
- none of the above
B. multicast
