Chapter 25 - Multiple Choice Quiz

1		________ audio/video refers to on-demand requests for compressed audio/video files.
			A)	Streaming live
			B)	Streaming stored
			C)	Interactive
			D)	None of the choices are correct
2		___________ audio/video refers to the broadcasting of radio and TV programs through the Internet.
			A)	Interactive
			B)	Streaming live
			C)	Streaming stored
			D)	None of the choices are correct
3		_________ audio/video refers to the use of the Internet for interactive audio/video applications.
			A)	Interactive
			B)	Streaming live
			C)	Streaming stored
			D)	None of the choices are correct
4		According to the Nyquist theorem, we need to sample an analog signal ________times the highest frequency.
			A)	three
			B)	two
			C)	four
			D)	None of the choices are correct
5		In ________ encoding, the differences between the samples are encoded instead of encoding all the sampled values.
			A)	predictive
			B)	perceptual
			C)	both predictive and perceptual
			D)	None of the choices are correct
6		__________ encoding is based on the science of psychoacoustics, which is the study of how people perceive sound.
			A)	Predictive
			B)	Perceptual
			C)	Predictive and perceptual
			D)	None of the choices are correct
7		____________ is used to compress images.
			A)	MPEG
			B)	JPEG
			C)	MPEG or JPEG
			D)	None of the choices are correct
8		____________ is used to compress video.
			A)	MPEG
			B)	JPEG
			C)	MPEG or JPEG
			D)	None of the choices are correct
9		The first phase of JPEG is ___________.
			A)	DCT transformation
			B)	quantization
			C)	data compression
			D)	None of the choices are correct
10		The second phase of JPEG is ___________.
			A)	DCT transformation
			B)	quantization
			C)	data compression
			D)	None of the choices are correct
11		The third phase of JPEG is ___________.
			A)	DCT transformation
			B)	quantization
			C)	data compression
			D)	None of the choices are correct
12		A ________buffer is required for real-time traffic.
			A)	playback
			B)	reordering
			C)	sorting
			D)	None of the choices are correct
13		A __________on each packet is required for real-time traffic.
			A)	timestamp
			B)	sequence number
			C)	Both a timestamp and a sequence number
			D)	None of the choices are correct
14		Real-time traffic needs the support of ____________.
			A)	broadcasting
			B)	multicasting
			C)	both a and b
			D)	None of the choices are correct
15		__________ means changing the encoding of a payload to a lower quality to match the bandwidth of the receiving network.
			A)	Translation
			B)	Mixing
			C)	encoding
			D)	None of the choices are correct
16		__________ means combining several streams of traffic into one stream.
			A)	Translation
			B)	Mixing
			C)	encoding
			D)	None of the choices are correct
17		__________ is the protocol designed to handle real-time traffic on the Internet.
			A)	TCP
			B)	UDP
			C)	RTP
			D)	None of the choices are correct
18		___________ is a protocol for controlling the flow and quality of data.
			A)	RTP
			B)	RTCP
			C)	UDP
			D)	None of the choices are correct
19		___________ is an application protocol that establishes, manages, and terminates a multimedia session
			A)	RIP
			B)	SIP
			C)	DIP
			D)	None of the choices are correct
20		_______ is a standard to allow telephones on the public telephone network to talk to computers connected to the Internet.
			A)	SIP
			B)	H.323
			C)	Q.991
			D)	None of the choices are correct
21		A real-time video performance lasts 10 min. If there is jitter in the system, the viewer spends _______ minutes watching the performance.
			A)	less than 10
			B)	more than 10
			C)	exactly 10
			D)	None of the choices are correct
22		A _______ shows the time a packet was produced relative to the first or previous packet.
			A)	timestamp
			B)	playback buffer
			C)	sequence number
			D)	None of the choices are correct
23		_______ are used to number the packets of a real-time transmission.
			A)	Timestamps
			B)	Playback buffers
			C)	Sequence numbers
			D)	None of the choices are correct
24		In a real-time video conference, data from the server is _______ to the client sites.
			A)	unicast
			B)	multicast
			C)	broadcast
			D)	None of the choices are correct
25		A _______ adds signals from different sources to create a single signal.
			A)	timestamp
			B)	sequence number
			C)	mixer
			D)	None of the choices are correct
26		A _______ changes the format of a high-bandwidth video signal to a lower quality narrow-bandwidth signal.
			A)	timestamp
			B)	sequence number
			C)	translator
			D)	None of the choices are correct
27		An RTP packet is encapsulated in _______.
			A)	a UDP user datagram
			B)	a TCP segment
			C)	an IP datagram
			D)	None of the choices are correct
28		When there is more than one source, the _______ identifier defines the mixer.
			A)	synchronization source
			B)	contributor
			C)	timestamp
			D)	None of the choices are correct