This document contains a 10 question multiple choice quiz on topics related to multimedia networking and differentiated services. The questions cover topics such as the causes of packet jitter, file sizes for MP3 songs, the purpose of protocols like RTSP and RTCP, characteristics of leaky bucket algorithms for policing network flows, and weighted fair queue scheduling policies.

1.  Home Self-Assessment Multiple Choice Quiz Chapter 9
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Self-Assessment Multiple Choice Quiz
Chapter 9: Multimedia Networking
Packet jitter is caused by:
A three-minute MP3 song occupies how much disk space?
Computer Networking: a Top-Down
Approach, 7th Edition
Kurose • Ross
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propagation delayspropagation delays
DNS lookupsDNS lookups
queuing in routersqueuing in routers
link transmission delayslink transmission delays
less than 100 Kbytesless than 100 Kbytes
between 100 Kbytes and 1 Mbytebetween 100 Kbytes and 1 Mbyte
between 1 Mbyte and 10 Mbytesbetween 1 Mbyte and 10 Mbytes
more than 10 Mbytesmore than 10 Mbytes

2. 3
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RTSP is an out-of-band signaling protocol because
In the adaptive playout strategy in Section 7.3, if u = .5 then
In the rst FEC scheme described in Section 7.3, there is a tradeo between
A single leaky bucket can be used to police a ow's
RTSP messages are sent over circuit-switched networksRTSP messages are sent over circuit-switched networks
RTSP messages are encapsulated into HTTP messagesRTSP messages are encapsulated into HTTP messages
RTSP messages arrive at the receiving side of the application through aRTSP messages arrive at the receiving side of the application through a
different socket than that of the medium streamdifferent socket than that of the medium stream
RTSP messages are interleaved with the media streamRTSP messages are interleaved with the media stream
ddii is the average packet delay up through the ith packetis the average packet delay up through the ith packet
ddii is the minimum packet delay up through the ith packetis the minimum packet delay up through the ith packet
ddii is the minimum packet delay up through the ith packetis the minimum packet delay up through the ith packet
none of the abovenone of the above
the ability to recover a large fraction of lost packets and the playback delaythe ability to recover a large fraction of lost packets and the playback delay
the playback delay and the network jitterthe playback delay and the network jitter
the ability to recover a large fraction of lost packets and the transmission rate ofthe ability to recover a large fraction of lost packets and the transmission rate of
the streamthe stream
all of the aboveall of the above

3. 6
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A single leaky bucket can be used to police a ow s
A di erentiated services router distinguishes between packet ows by using the
packets'
In a di erentiated services architecture, packets can be classi ed according to their
average rateaverage rate
peak ratepeak rate
burst sizeburst size
all of the aboveall of the above
source IP addressessource IP addresses
markingsmarkings
source IP address and markingssource IP address and markings
none of the abovenone of the above
source and destination IP addresssource and destination IP address
source and destination port numberssource and destination port numbers
protocol identifiersprotocol identifiers
all of the aboveall of the above

4. 9
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The period for transmitting RTCP packets for a sender depends on the
Suppose that the WFQ scheduling policy is applied to a bu er that supports three
classes, and suppose the weights are .5, .3, and .2 for classes 1, 2, and 3, respectively.
Also suppose that each class has a large number of packets in the bu er. Then the
classes could be served in which of the following sequences
See Results
Reset / Start Over
number of sendersnumber of senders
session bandwidthsession bandwidth
average RTCP packet sizeaverage RTCP packet size
all of the aboveall of the above
123123123123123....123123123123123....
121312131212131213121213121312.....121312131212131213121213121312.....
121312131213121312131213.......121312131213121312131213.......
none of the abovenone of the above

5. Other Customers
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