ESAT Forouzan - Chapter 28: Multimedia

Question 1

For streaming stored audio/video, the _______ holds information about the audio/video file
a. Alpha file
b. Beta file
c. Metafile
d. Jitter

Answer 1

c. Metafile

Question 2

_______ is a control protocol that adds functionalities to the streaming process.
a. RTSP
b. HTTP
c. TCP/IP
d. SIP

Answer 2

a. RTSP

Question 3

The audio/video stream is sent by the media server to the _______.
a. Browser
b. Web server
c. Media player
d. None of the above

Answer 3

c. Media player

Question 4

A _______ shows when a packet was produced relative to the first or previous packet.
a. Timestamp
b. Playback buffer
c. Sequence number
d. Threshold

Answer 4

a. Timestamp

Question 5

_______ are used to number the packets of a real-time transmission.
a. Timestamps
b. Playback buffers
c. Sequence numbers
d. Translators

Answer 5

c. Sequence numbers

Question 6

In a real-time video conference, data from the server are _______ to the client sites.
a. Unicast
b. Multicast
c. Broadcast
d. None of the above

Answer 6

b. Multicast

Question 7

A _______ adds signals from different sources to create a single signal.
a. Timestamp
b. Sequence number
c. Mixer
d. Translator

Answer 7

c. Mixer

Question 8

A _______ changes the format of a high-bandwidth video signal to a lower-quality narrow-bandwidth signal
a. Timestamp
b. Sequence number
c. Mixer
d. Translator

Answer 8

d. Translator

Question 9

An RTP packet is encapsulated in a(n)_______.
a. UDP user diagram
b. TCP segment
c. IP datagram
d. RTCP packet

Answer 9

a. UDP user diagram

Question 10

TCP is not suitable for real-time traffic because _______.
a. There is no provision for timestamping
b. There is no support for multicasting
c. Missing packets are retransmitted
d. All of the above

Answer 10

d. All of the above

Question 11

JPEG encoding involves _______, a process that reveals the redundancies in a block.
a. Blocking
b. The DCT
c. Quantization
d. Vectorization

Answer 11

b. The DCT

Question 12

The last step in JPEG, _______, removes redundancies.
a. Blocking
b. Quantization
c. Compression
d. Vectorization

Answer 12

c. Compression

Question 13

The RTCP _______ message shuts down a stream.
a. Aplication-specific
b. Bye
c. Source description
d. Farewell

Answer 13

b. Bye

Question 14

The RTCP _______ report informs the sender and other receivers about the quality of service.
a. Sender
b. Receiver
c. QoS
d. Passive

Answer 14

b. Receiver

Question 15

Voice over IP is a(n) _______ audio/video application.
a. Streamin stored
b. Streaming live
c. Interactive
d. None of the above

Answer 15

c. Interactive

Question 16

_______ is an application layer protocol that establishes, maintains, and terminates a multimedia session.
a. SIP
b. RTCP
c. DCT
d. JPEG

Answer 16

a. SIP

Question 17

_______ is a SIP message type.
a. INVITE
b. CANCEL
c. OPTION
d. All of the above

Answer 17

d. All of the above

Question 18

A _______ is involved in a SIP mechanism to find the IP address of a callee.
a. Proxy server
b. Register
c. Media server
d. a and b

Answer 18

d. a and b

Question 19

A standard that allows a telephone (connected to a public telephone network) to talk to a computer connected to the Internet is _______.
a. IEEE 802.3
b. SIP
c. H.323
d. V.90bis

Answer 19

c. H.323

Question 20

_______ is a protocol to set up and terminate a connection between a computer on the Internet and a telephone (connected to a public telephone network).
a. H.323
b. Q.931
c. H.245
d. H.225

Answer 20

b. Q.931