Fourozan MCQ From 4th Edition

7/25/2019 Fourozan MCQ From 4th Edition

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MCQ ON COMPUTER NETWORKS

Textbook Referred: Data Communication &

Networking

(Please Note All the Correct Answers Are Marked As BOLD)

CHAPTER 1

1: The _______ is the physical path over which a message travels.

a. Protocol

b. Medium

c. Signal d. All the above

2: The information to be communicated in a data communications system is the _______.

a. edium

b. Protocol

c. Message

d. Transmission

!:

"re#uency of failure and networ$ recovery time after a failure measured as the _______ of a networ$.

%A& Performance %'& Security %(& )eliability %*& "easibility

+: An unauthori,ed user is a networ$ _______ issue.

a. Performance

b. )eliability

c. Security

d. All the above

-: hich topology re#uires a central controller or hub/

a. esh

b. Star

c. 'us

d. )ing

0: hich topology re#uires a multipoint connection/

a. esh


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b. Star

c. Bus

d. )ing

: (ommunication between a computer and a $eyboard involves ______________ transmission.

a. simplex

b. halfduple3

c. fullduple3

d. automatic

4: A television broadcast is an e3ample of _______ transmission.

a. simplex

b. halfduple3

c. fullduple3 d. automatic

5: A _______ connection provides a dedicated lin$ between two devices.

a. point-to-point

b. multipoint

c. primary

d. secondary

16: 7n a _______ connection8 more than two devices can share a single lin$.

a. pointtopoint

b. multipoint

c. primary

d. secondary

11: 7n _______ transmission8 the channel capacity is shared by both communicating devices at all times

a. simple3 b. halfduple3

c. full-duplex

d. halfsimple3


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12: 7n the original A)PA9T8 _______ were directly connected together.

a. IMPs

b. host computers

c. networ$s

d. routers

1!: This was the first networ$.

a. (S9T

b. 9S"9T

c. A9S9T

d. ARPANE

1+: hich organi,ation has authority over interstate and international commerce in the communications

field/

a. 7T;T b. 7

c. !""

d. 7S


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14: _______ refers to the structure or format of the data8 meaning the order in which they are presented

a. Semantics

b. Syntax

c. Timing

d. All of the above

15: ________ defines how a particular pattern to be interpreted8 and what action is to be ta$en based o

that interpretation.

a. Semantics

b. Synta3

c. Timing

d. 9one of the above

26: _______ refers to two characteristics: when data should be sent and how fast it can be sent.

a. Semantics

b. Synta3

c. iming

d. none of the above

21: *ata flow between two devices can occur in a _______ way.

a. simple3

b. halfduple3

c. fullduple3

d. all of t$e abo%e

22: 7n a ______ connection8 two and only two devices are connected by a dedicated lin$. a. multipoint

b. point-to-point

c. %a& and %b&


2!: 7n a ________ connection8 three or more devices share a lin$.

a. multipoint

b. pointtopoint

c. %a& and %b&


2+: ______ refers to the physical or logical arrangement of a networ$.


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a. *ata flow

b. ode of operation

c. opology


2-: *evices may be arranged in a _____ topology.

a. mesh

b. ring

c. bus

d. all of t$e abo%e

20: A _______ is a data communication system within a building8 plant8 or campus8 or between nearby

buildings.

a. A9

b. &AN

c. A9 d. none of the above

2: A ______ is a data communication system spanning states8 countries8 or the whole world.

a. A9

b. >A9

c. 'AN


24: ________ is a collection of many separate networ$s.

a. A A9

b. internet

c. a >A9


25: There are ______________ 7nternet service providers.

a. local

b. regional

c. national and international

d. all of t$e abo%e

!6: A ________ is a set of rules that governs data communication.

a. forum

b. protocol

c. standard


!1: ________ is an idea or concept that is a precursor to an 7nternet standard.

a. )("


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b. R!"

c. 7*


CHAPTER 21: The 7nternet model consists of _______ layers.

a. Three

b. !i%e

c. Seven

d. ight

2: The processtoprocess delivery of the entire message is the responsibility of the _______ layer.

a. 9etwor$

b. ransport c. Application

d. Physical

!: The _______ layer is the layer closest to the transmission medium.

a. P$ysical

b. *ata lin$

c. 9etwor$

d. Transport

+: ail services are available to networ$ users through the _______ layer.

a. *ata lin$

b. Physical

c. Transport

d. Application

-: As the data pac$et moves from the upper to the lower layers8 headers are _______.

a. Added

b. )emoved

c. )earranged

d. odified

0: The _______ layer lies between the networ$ layer and the application layer.

a. Physical

b. *ata lin$


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c. ransport


: >ayer 2 lies between the physical layer and the _______ layer.

a. Net(or)

b. *ata lin$

c. Transport


4: hen data are transmitted from device A to device '8 the header from A?s layer + is read by '?s

_______ layer.

a. Physical

b. ransport

c. Application


5: The _______ layer changes bits into electromagnetic signals.

a. P$ysical

b. *ata lin$

c. Transport


16: hich of the following is an application layer service/

a. )emote login

b. "ile transfer and access

c. ail service

d. All t$e abo%e

11: hy was the


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1+: The


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a. port

b. 7P

c. physical


21: 7Pv0 has _______ bit addresses. a. !2

b. 0+

c. +,

d. variable

22: 7(Pv0 includes _______.

a. 7P

b. A)P

c. )A)P

d. a and b

2!: The ______ layer is responsible for moving frames from one hop %node& to the ne3t.

a. physical

b. data lin)

c. transport


2+: The ______ layer adds a header to the pac$et coming from the upper layer that includes the logical

addresses of the sender and receiver.

a. physical

b. data lin$

c. net(or)


2-: The_________ layer is responsible for the delivery of a message from one process to another.

a. physical

b. transport

c. networ$


20: The 7nternetwor$ing Protocol %7P& is a ________ protocol. a. reliable

b. connectionoriented

c. both a and b

d. none of t$e abo%e

2: _______ is a processtoprocess protocol that adds only port addresses8 chec$sum error control8

and length information to the data from the upper layer.


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a. T(P

b. /P

c. 7P


24: __________ provides full transport layer services to applications. a. "P

b. ;*P

c. A)P


25: The ________ address8 also $nown as the lin$ address8 is the address of a node as defined by its

>A9 or A9.

a. port

b. p$ysical

c. logical


!6: thernet uses a ______ physical address that is imprinted on the networ$ interface card %97(&.

a. !2bit

b. 0+bit

c. 0-byte


!1: A port address in T(P@7P is ______ bits long.

a. !2

b. +4

c. +0


!2: The ____ created a model called the


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!+: The physical8 data lin$8 and networ$ layers are the ______ support layers.

a. user

b. net(or)

c. both %a& and %b&

d. neither %a& nor %b&

!-: The session8 presentation8 and application layers are the ____ support layers.

a. user

b. networ$

c. both %a& and %b&


!0: The _______ layer lin$s the networ$ support layers and the user support layers.

a. transport

b. networ$

c. data lin$

d. session

!: The _______ layer coordinates the functions re#uired to transmit a bit stream over a physical

medium.

a. transport

b. networ$

c. data lin$

d. p$ysical

!4: The _______ layer is responsible for delivering data units from one station to the ne3t without errors

a. transport

b. networ$

c. data lin)

d. physical

!5: The ______ layer is responsible for the sourcetodestination delivery of a pac$et across multiple

networ$ lin$s.

a. transport

b. net(or)

c. data lin$ d. physical

+6: The ________ layer is responsible for the processtoprocess delivery of the entire message.

a. transport

b. networ$


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c. data lin$

d. physical

+1: The ______ layer establishes8 maintains8 and synchroni,es the interactions between communicating

devices.

a. transport

b. networ$

c. session

d. physical

+2: The _______ layer ensures interoperability between communicating devices through transformation

of data into a mutually agreed upon format.

a. transport

b. networ$

c. data lin$

d. presentation

+!: The _________ layer enables the users to access the networ$.

a. transport

b. application

c. data lin$

d. physical

++: T(P@7P is a ______ hierarchical protocol suite developed ____ the


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b. 7P

c. port

d. specific

+: The ____ address uni#uely defines a host on the 7nternet.

a. physical b. IP

c. port

d. specific

+4: The_____ address identifies a process on a host.

a. physical

b. 7P

c. port

d. specific

"2APER 3

1: 'efore data can be transmitted8 they must be transformed to ________.

a. periodic signals

b. electromagnetic signals

c. aperiodic signals

d. lowfre#uency sine waves

2: A periodic signal completes one cycle in 6.661 s. hat is the fre#uency/

a. 1 C,

b. 166 C,

c. + 425

d. 1 C,

!: 7n a fre#uencydomain plot8 the hori,ontal a3is measures the ________.

a. pea$ amplitude

b. fre6uency

c. phase

d. slope

+: 7n a timedomain plot8 the hori,ontal a3is is a measure of ________.

a. signal amplitude

b. fre#uency

c. phase

d. time


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-: 7f the bandwidth of a signal is - DC, and the lowest fre#uency is -2 DC,8 what is the highest

fre#uency/

a. - DC,

b. 16 DC,

c. + DC, d. 78 425

0: hat is the bandwidth of a signal that ranges from 1 C, to + C,/

a. + C,

b. 1 DC,

c. 3 M25


: As fre#uency increases8 the period ________.

a. decreases

b. increases

c. remains the same

d. doubles

4: iven two sine waves EiFAE@iF and EiF'E@iF8 if the fre#uency of EiFAE@iF is twice that of EiF'E@iF8

then the period of EiF'E@iF is ________ that of EiFAE@iF.

a. onehalf

b. t(ice

c. the same as

d. indeterminate from

5: A sine wave is ________.

a. periodic and continuous

b. aperiodic and continuous

c. periodic and discrete

d. aperiodic and discrete

16: 7f the ma3imum amplitude of a sine wave is 2 G8 the minimum amplitude is ________ G. a. 2

b. 1

c. -,

d. between 2 and 2

11: A signal is measured at two different points. The power is EiFPE@iFEsubF1E@subF at the first point an


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EiFPE@iFEsubF2E@subF at the second point. The d' is 6. This means ________.

a. EiFPE@iFEsubF2E@subF is ,ero

b. 9i:P9#i:9sub:,9#sub: e6uals 9i:P9#i:9sub:+9#sub:

c. EiFPE@iFEsubF2E@subF is much larger than EiFPE@iFEsubF1E@subF

d. EiFPE@iFEsubF2E@subF is much smaller than EiFPE@iFEsubF1E@subF

12: ________ is a type of transmission impairment in which the signal loses strength due to the

resistance of the transmission medium.

a. Attenuation

b. *istortion

c. 9oise

d. *ecibel

1!: ________ is a type of transmission impairment in which the signal loses strength due to the differen

propagation speeds of each fre#uency that ma$es up the signal.

a. Attenuation

b. /istortion

c. 9oise

d. *ecibel

1+: ________ is a type of transmission impairment in which an outside source such as crosstal$ corrupt

a signal.

a. Attenuation

b. *istortion

c. Noise

d. *ecibel

1-: hen propagation speed is multiplied by propagation time8 we get the ________.

a. throughput

b. wavelength of the signal

c. distortion factor

d. distance a signal or bit $as tra%eled

10: *ata can be ________.

a. analog

b. digital

c. ;a< or ;b b. P"M

c. sampling


22: The first step in P( is ________.

a. #uanti,ation

b. modulation

c. sampling


2!: There are three sampling methods: __________. a. #uanti,ed8 sampled8 and ideal

b. ideal8 sampled8 and flattop

c. ideal@ natural@ and flat-top


2+: ______ finds the value of the signal amplitude for each sampleB ____ finds the change from the


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previous sample.

a. *B P(

b. P"M1 /M

c. *B (


2-: hile there is %are& only _____ way%s& to send parallel data8 there is %are& three subclass%es& of seria

transmission.

a. oneB two

b. twoB three

c. one1 t$ree


20: 7n ______ transmission8 we send 1 start bit %6& at the beginning and 1 or more stop bits %1s& at the

end of each byte.

a. synchronous b. async$ronous

c. isochronous


2: 7n _________ transmission8 we send bits one after another without start or stop bits or gaps. 7t is the

responsibility of the receiver to group the bits.

a. sync$ronous

b. asynchronous

c. isochronous


24: The ________ mode provides synchroni,ation for the entire stream of bits must. 7n other words8 it

guarantees that the data arrive at a fi3ed rate.

a. synchronous

b. asynchronous

c. isoc$ronous


25: A _________ digital signal includes timing information in the data being transmitted.

a. self-sync$roni5ing

b. selfmodulated

c. selftransmitted


!6: 7n decoding a digital signal8 the receiver calculates a running average of the received signal power8

called the _______.


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a. baseline

b. base

c. line


!1: The ________ rate defines the number of data elements sent in 1sB the ______ rate is the number osignal elements sent in 1s.

a. data1 signal

b. signalB data

c. baudB bit


!2: The signal rate is sometimes called the ____ rate.

a. baud

b. bit

c. signal


!!: The data rate is sometimes called the ___ rate.

a. baud

b. bit

c. signal


!+: 7n a _____ scheme8 all the signal levels are on one side of the time a3is8 either above or below. a. polar

b. bipolar

c. unipolar

d. all of the above

!-: 7n ______ schemes8 the voltages are on the both sides of the time a3is. "or e3ample8 the voltage

level for 6 can be positive and the voltage level for 1 can be negative.

a. polar

b. bipolar

c. unipolar d. all of the above

!0: 7n _____8 the level of the voltage determines the value of the bit.

a. 9)H7

b. NR?-&

c. both %a& and %b&



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!: 7n ______8 the change or lac$ of change in the level of the voltage determines the value of the bit.

a. NR?-I

b. 9)H>

c. both %a& and %b&


!4: The idea of )H and the idea of 9)H> are combined into the ________ scheme.

a. Manc$ester

b. differential anchester

c. both %a& and %b&


!5: The idea of )H and the idea of 9)H7 are combined into the ________ scheme.

a. anchester

b. differential Manc$ester

c. both %a& and %b&


+6: 7n _______ encoding8 the duration of the bit is divided into two halves. The voltage remains at one

level during the first half and moves to the other level in the second half. The transition at the middle of

the bit provides synchroni,ation.

a. anchester

b. differential anchester c. bot$ ;a< and ;bT!


+0: The ______ scheme uses three levels %IG8 68 and G& and three transition rules to move between the

levels.

a. +'-'

b. 2'1J

c. M&-3


+: ______ substitutes eight consecutive ,eros with 666G'6G'.

a. '+'4

b. C*'!

c. B?S


+4: ______ substitutes four consecutive ,eros with 666G or '66G

a. '+'4

b. 2/B3

c. '4HSf


"2APER 7


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1: ASD8 PSD8 "SD8 and JA are e3amples of ________ conversion.

a. digitaltodigital

b. digital-to-analog

c. analogtoanalog

d. analogtodigital

2: A and " are e3amples of ________ conversion.

a. digitaltodigital

b. digitaltoanalog

c. analog-to-analog

d. analogtodigital

!: 7n JA8 both ________ of a carrier fre#uency are varied.

a. fre#uency and amplitude

b. phase and fre#uency c. amplitude and p$ase


+: 7f the baud rate is +66 for a JPSD signal8 the bit rate is ________ bps.

a. 166

b. +66

c. >>

d. 1066

-: 7f the bit rate for an ASD signal is 1266 bps8 the baud rate is ________.

a. !66 b. +66

c. 066

d. +,>>

0: 7f the bit rate for an "SD signal is 1266 bps8 the baud rate is ________.

a. !66

b. +66

c. 066

d. +,>>

: 7f the bit rate for a 10JA signal is +666 bps8 what is the baud rate/

a. !66

b. +66

c. +>>>

d. 1266

4: 7f the baud rate for a 0+JA signal is 26668 what is the bit rate/


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a. !66

b. +66

c. 1666

d. +,>>>

5: iven an A radio signal with a bandwidth of 16 DC, and the highestfre#uency component at 6-DC,8 what is the fre#uency of the carrier signal/

a. 8>> 425

b. 6- DC,

c. 16 DC,

d. (annot be determined from given information

16: _______ conversion is the process of changing one of the characteristics of an analog signal based

on the information in the digital data.

a. /igital-to-analog

b. Analogtoanalog c. Analogtodigital

d. *igitaltodigital

11: hich of the following is not a digitaltoanalog conversion/

a. ASD

b. PSD

c. "SD

d. AM

12: 7n ________8 the amplitude of the carrier signal is varied to create signal elements. 'oth fre#uency

and phase remain constant.

a. AS4

b. PSD

c. "SD

d. JA

1!: 7n _________8 the fre#uency of the carrier signal is varied to represent data. 'oth pea$ amplitude

and phase remain constant.

a. ASD

b. PSD c. !S4

d. JA

1+: 7n ________8 the phase of the carrier is varied to represent two or more different signal elements.

'oth pea$ amplitude and fre#uency remain constant.

a. ASD

b. PS4


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c. "SD

d. JA

1-: A constellation diagram shows us the __________ of a signal element8 particularly when we are

using two carriers %one inphase and one #uadrature&.

a. amplitude and p$ase b. amplitude and fre#uency

c. fre#uency and phase


10: Juadrature amplitude modulation %JA& is a combination of ___________.

a. ASD and "SD

b. AS4 and PS4

c. PSD and "SD d. none of the above

1: ________ uses two carriers8 one inphase and the other #uadrature.

a. ASD

b. PSD

c. "SD

d. AM

14: _________ conversion is the representation of analog information by an analog signal.

a. *igitaltoanalog b. Analog-to-analog

c. Analogtodigital

d. *igitaltodigital

15: Analogtoanalog conversion is needed if the available bandwidth is _______.

a. lowpass

b. band-pass

c. either %a& or %b&


26: hich of the following is not an analogtoanalog conversion/

a. A

b. P

c. "

d. AM


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21: 7n _____ transmission8 the carrier signal is modulated so that its amplitude varies with the changing

amplitudes of the modulating signal.

a. AM

b. P

c. " d. none of the above

22: 7n _____ transmission8 the fre#uency of the carrier signal is modulated to follow the changing voltag

level %amplitude& of the modulating signal. The pea$ amplitude and phase of the carrier signal remain

constant8 but as the amplitude of the information signal changes8 the fre#uency of the carrier changes

correspondingly.

a. A

b. P

c. !M


2!: 7n _____ transmission8 the phase of the carrier signal is modulated to follow the changing voltage

level %amplitude& of the modulating signal.

a. A

b. PM

c. "


2+: 7n _______8 the pea$ amplitude of one signal level is 6B the other is the same as the amplitude of the

carrier fre#uency.

a. PSD

b. **4

c. "SD


2-: Cow many carrier fre#uencies are used in 'ASD/ a. 2

b. +

c. 6


20: Cow many carrier fre#uencies are used in '"SD/


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a. ,

b. 1

c. 6


2: Cow many carrier fre#uencies are used in 'PSD/ a. 2

b. +

c. 6


24: Cow many carrier fre#uencies are used in JPSD/

a. ,

b. 1

c. 6


25: The constellation diagram of 'ASD has ______ dots.

a. ,

b. 1

c. 6


!6: The constellation diagram of 'PSD has ______ dots.

a. ,

b. 1 c. 6


!1: The constellation diagram of JPSD has ______ dots.

a. 2

b. 1

c. =


!2: The constellation diagram of 10JA has ______ dots. a. +

b. +0

c. 4


!!: The "ederal (ommunications (ommission %"((& allows ______$C, for each A station.

a. -


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b. +>

c. 26


!+: The "ederal (ommunications (ommission %"((& allows ______ $C, for each " station.

a. 26

b. +>>

c. 266


"2APER 0

1: The sharing of a medium and its lin$ by two or more devices is called _______.

a. modulation

b. encoding

c. line discipline

d. multiplexing

2: hich multiple3ing techni#ue transmits analog signals/

a. "*

b. T*

c. *

d. ;a< and ;c

b. 26

c. !6

d. +6

26: 'ased on the (los criteria8 if 9 L 2668 then EiF$E@iF must be e#ual to or greater than ____.

a. 21

b. +C

c. !1

d. +1


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21: 'ased on the (los criteria8 if 9 L 2668 then the minimum number of crosspoints is greater than or

e#ual to _______.

a. +7@,>>

b. 148666

c. +28666

d. 268666

22: 7n a onestage space division switch8 if 9 L 2668 the number of crosspoints is ______.

a. 168666

b. 268666

c. =>@>>>

d. !68666

2!: 7n a threestage space division switch8 if 9 L 2668 the number of crosspoints is ______.

a. +68666

b. greater than +68666 c. less t$an =>@>>>

d. greater than 1668666

2+: A ________ switch combines crossbar switches in several %normally three& stages.

a. multistage

b. multiple crossbar

c. multiple path


2-: 7n _______ switching8 the paths in the circuit are separated from one another spatially.

a. timedivision

b. space-di%ision

c. twodimensional

d. threedimensional

20: A switched A9 is normally implemented as a _______ networ$.

a. %irtual-circuit

b. datagram

c. circuitswitched

d. none of the above2: 7n a ________ networ$8 two types of addressing are involved: global and local.

a. %irtual-circuit

b. datagram

c. circuitswitched


24: The networ$ layer in the 7nternet is designed as a __________ networ$.


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a. virtualcircuit

b. datagram

c. circuitswitched


25: A switch in a datagram networ$ uses a routing table that is based on the ______ address. a. source

b. destination

c. local


!6: The _______ address in the header of a pac$et in a datagram networ$ normally remains the same

during the entire Kourney of the pac$et.

a. source

b. destination

c. local


"2APER C

1: A local telephone networ$ is an e3ample of a _______ networ$.

a. pac$etswitched

b. circuit-s(itc$ed

c. messageswitched


2: The local loop has _______ cable that connects the subscriber telephone to the nearest end office.

a. t(isted-pair

b. coa3ial

c. fiberoptic


!: *ata from a computer are _______B the local loop handles _______ signals.

a. analogB analog

b. analogB digital

c. digitalB digital

d. digital1 analog

+: _______ is suitable for businesses that re#uire comparable upstream and downstream data rates.


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a. G*S>

b. A*S>

c. S/S&

d. %a& and %b&

-: *T is a modulation techni#ue that combines elements of _______ and _______.

a. "*B T*

b. J*B JA

c. !/M1 AM

d. PSDB "SD

0: The largest portion of the bandwidth for A*S> carries _______.

a. voice communication

b. upstream data

c. do(nstream data

d. control data

: _______ was designed as an alternative to the T1 line.

a. G*S>

b. A*S>

c. S*S>

d. 2/S&

4: C*S> encodes data using _______.

a. +'@-' b. ,B+

c. 1'2J

d. 0'@4T

5: Another name for the cable TG office is the _______.

a. splitter

b. fiber node

c. combiner

d. $ead end

16: A traditional cable TG networ$ transmits signals ______.

a. upstream


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b. do(nstream

c. upstream and downstream


11: 7n an C"( networ$8 the downstream data are modulated using the _______ modulation techni#ue.

a. PSD b. AM

c. P(

d. ASD

12: 7n an C"( networ$8 the upstream data are modulated using the _______ modulation techni#ue.

a. JA

b. PS4

c. P(

d. ASD

1!: The standard for data transmission over an C"( networ$ is called _______.

a. (9S

b. /*"SIS

c. (TS

d. A*S>

1+: The original telephone networ$8 which is referred to as the plain old telephone system %P


47/188

1: The ;nited States is divided into many _______.

a. >(s

b. &AAs

c. 7=(s


14: The carrier that handles intra>ATA services is called a%n& _____ .

a. P(


26: 7n ______signaling8 the same circuit is used for both signaling and data.

a. in-band

b. outofband

c. mi3ed


21: 7n ________signaling8 a portion of the bandwidth is used for signaling and another portion for data.

a. inband

b. out-of-band

c. mi3ed


22: The protocol that is used for signaling in the telephone networ$ is called ______.

a. P


48/188

_____services.

a. switchedB inband

b. outofbandB inband

c. s(itc$ed1 leased

d. leasedB outofband

2+: The two most common digital services are ________ service and ______.

a. switched@-0B switched@0+

b. s(itc$ed#701 //S

c. **SB swiched 0+

d. leasedB outofband

2-: The term EiFmodemE@iF is a composite word that refers to the two functional entities that ma$e up

the device: a signal _______ and a signal _______.

a. modulator1 demodulator

b. demodulatorB modulator

c. modernB demo


20: ost popular modems available are based on the ________standards.

a. -series

b. =series

c. G=series


2: ______technology is a set of technologies develpoed by the telephone companies to provide high

data rate transmission.

a. AS>

b. /S&

c. >*S


24: The traditional cable TG system used ________cable end to end. a. twistedpair

b. coaxial

c. fiberoptic


25: The second generation of cable networ$s is called a%n& _________ networ$.


49/188

a. 2!"

b. C("

c. ("C


!6: The C"( networ$ uses _______ cable. a. twistedpair

b. coa3ial

c. fiberoptic

d. a combination of ;b< and ;c!

2: 7f an thernet destination address is 6:61:62:6!:6+:6-8 then this is a ______ address.

a. unicast

b. multicast

c. broadcast

d. any of the above

!: 7f an thernet destination address is 64:6:60:6-:++:!!8 then this is a ______ address.

a. unicast

b. multicast c. broadcast

d. any of the above

+: hich of the following could not be an thernet unicast destination/

a. =38B0"/E+>>>

b. ++:AA:(1:2!:+-:!2

c. +0:-0:21:1A:*:"+

d. +4:!2:21:21:+*:!+

-: hich of the following could not be an thernet multicast destination/

a. ':':0(:*:16:66

b. ':AA:(1:2!:+-:!2

c. 8"70,++A/E!=

d. 4!:!2:21:21:+*:!+

0: _______ is the most widely used local area networ$ protocol.

a. To$en )ing

b. To$en 'us

c. Et$ernet


: The 7 462.! Standard defines _________ (SA@(* as the access method for firstgeneration 16

bps thernet.

a. +-persistent

b. ppersistent

c. nonpersistent



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4: The _______ layer of thernet consists of the >>( sublayer and the A( sublayer.

a. data lin)

b. physical

c. networ$


5: The _____ sublayer is responsible for the operation of the (SA@(* access method and framing.

a. >>(

b. 77

c. MA"


16: ach station on an thernet networ$ has a uni#ue _______ address imprinted on its networ$

interface card %97(&.

a. -byte b. !2bit

c. =-bit


11: The minimum frame length for 16bps thernet is _______bytes.

a. !2

b. 46

c. 124


12: The ma3imum frame length for 16bps thernet is ________ bytes.

a. +7+

b. 1-66

c. 1266


1!: _________ uses thic$ coa3ial cable.

a. +>Base7

b. 16'ase2

c. 16'aseT

d. 16'ase"

1+: __________ uses thin coa3ial cable.

a. 16'ase-

b. +>Base,

c. 16'aseT

d. 16'ase"


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1-: _________ uses four twistedpair cables that connect each station to a common hub.

a. 16'ase-

b. 16'ase2

c. +>Base-

d. 16'ase"

10: ________ uses fiberoptic cable.

a. 16'ase-

b. 16'ase2

c. 16'aseT

d. +>Base-!

1: "ast thernet has a data rate of ________bps.

a. 16

b. +>>

c. 1666

d. 168666

14: 7n _________8 autonegotiation allows two devices to negotiate the mode or data rate of operation.

a. Standard

b. !ast Et$ernet

c. igabit thernet

d. Tenigabit thernet

15: __________ uses two pairs of twistedpair cable.

a. +>>Base-D

b. 166'ase"= c. 166'aseT+


26: _________ uses two fiberoptic cables.

a. 166'aseT=

b. +>>Base-!D

c. 166'aseT+


21: _________ uses four pairs of voicegrade8 or higher8 twistedpair cable. a. 166'aseT=

b. 166'ase"=

c. +>>Base-=


22: igabit thernet has a data rate of ________bps.

a. 16


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b. 166

c. +>>>

d. 168666

2!: igabit thernet access methods include _______ mode.

a. halfduple3 b. fullduple3

c. bot$ ;a< and ;b>>Base-SD

b. 1666'ase>=

c. 1666'aseT


2-: __________uses two optical fibers and a longwave laser source.

a. 1666'aseS=

b. +>>>Base-&D

c. 1666'aseT


20: __________ uses four twisted pairs.

a. 1666'aseS=

b. 1666'ase>=

c. +>>>Base-


2: ________ uses shortwave 4-6nm multimode fiber.

a. +>HBase-S

b. 16'ase>

c. 16'ase


24: ________uses longwave 1!16nm single mode fiber.

a. 16'aseS

b. +>HBase-&

c. 16'ase


25: ________ uses 1--6mm single mode fiber.

a. 16'aseS

b. 16'ase>

c. +>HBase-E


72/188


!6: 7n thernet addressing8 if the least significant bit of the first byte is 68 the address is _________.

a. unicast b. multicast

c. broadcast


!1: 7n thernet addressing8 if the least significant bit of the first byte is 18 the address is _________.

a. unicast

b. multicast

c. broadcast


!2: 7n thernet addressing8 if all the bits are 1s8 the address is _________. a. unicast

b. multicast

c. broadcast


!!: ______defines a protocol data unit %P*;& that is somewhat similar to that of C*>(.

a. A(

b. &&"

c. >>;


!+: The purpose of the _______ is to provide flow and error control for the upperlayer protocols that

actually demand these services

a. A(

b. &&"

c. >>;


!-: 7n the thernet8 the _______field is actually added at the physical layer and is not %formally& part of

the frame.

a. ()( b. preamble

c. address



73/188

!0: 7n the thernet frame8 the _______ field contains error detection information.

a. "R"

b. preamble

c. address


!: Standard thernet %16bps& uses _______ encoding

a. 9)H

b. A7

c. Manc$ester

d. differential anchester

!4: 166'aseT= uses _________ bloc$ coding and ________ line coding.

a. +'@-'B 9)H

b. 4'@16'B 9)H

c. =B#7B1 M&-3

d. 4'@16'B 9)H

!5: 166'ase"= uses _________ bloc$ coding and ________ line coding.

a. =B#7B1 NR?-I

b. 4'@16'B 9)H

c. +'@-'B >T!

d. 4'@16'B 9)H

+6: 166'aseT+ uses ________ line coding.

a. 9)H b. B0

c. >T!

d. anchester

+1: 1666'aseS=8 1666'ase>=8 and 1666'ase(= use _________ bloc$ coding and ________ line

coding.

a. +'@-'B 9)H

b. B#+>B1 NR?

c. +'@-'B >T!

d. 4'@16'B 9)H

+2: 1666'aseT uses ________ line coding.

a. =/-PAM7

b. 4'0T

c. >T!

d. anchester


74/188

"2APER +=

1: 7 has defined the specifications for a wireless >A98 called _______8 which covers the physical

and data lin$ layers.

a. 7 462.!

b. 7 462.-

c. IEEE >,.++

d. 7 462.2

2: 7n 7 462.118 a ___ is made of stationary or mobile wireless stations and an optional central base

station8 $nown as the access point %AP&.

a. SS

b. BSS

c. (SS


!: 7n 7 462.118 a 'SS without an AP is called an _________.

a. an ad $oc arc$itecture

b. an infrastructure networ$



+: 7n 7 462.118 a 'SS with an AP is sometimes referred to as ____________.

a. an ad hoc architecture

b. an infrastructure net(or)

c. either %a& or %b& d. neither %a& nor %b&

-: 7n 7 462.118 communication between two stations in two different 'SSs usually occurs via two

________.

a. 'SSs

b. SSs

c. APs


0: 7n 7 462.118 a station with ________ mobility is either stationary %not moving& or moving only

inside a 'SS.

a. no-transition

b. 'SStransition

c. SStransition



75/188

: 7n 7 462.118 a station with ________mobility can move from one 'SS to another8 but the

movement is confined inside one SS.

a. notransition

b. BSS-transition

c. SStransition d. none of the above

4: 7n 7 462.118 a station with ________ mobility can move from one SS to another.

a. notransition

b. 'SStransition

c. ESS-transition


5: 7n 7 462.118 _______ is an optional access method that can be implemented in an infrastructure

networ$ %not in an ad hoc networ$&.

a. *("

b. P"!



16: 7n 7 462.118 when a frame is going from one station in a 'SS to another without passing through

the distribution system8 the address flag is _____

a. >>

b. 61

c. 16

d. 11

11: 7n 7 462.118 when a frame is coming from an AP and going to a station8 the address flag is

_______.

a. 66

b. >+

c. 16

d. 11

12: 7n 7 462.118 when a frame is going from a station to an AP8 the address flag is _____.

a. 66

b. 61

c. +>

d. 11


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1!: 7n 7 462.118 when a frame is going from one AP to another AP in a wireless distribution system8

the address flag is _____

a. 66

b. 61

c. 16 d. ++

1+: The 7 462.11 standard for wireless >A9s defines two services: ______ and _______.

a. 'SSB ASS

b. SSB SSS

c. BSS1 ESS

d. 'SSB *("

1-: 7n 7 462.118 the access method used in the *(" sublayer is _________.

a. A>


77/188

26: The original 7 462.118 uses _________.

a. "CSS

b. *SSS

c.


78/188

2: 7 462.11g8 has a data rate of _____bps.

a. 1

b. 2

c. 11

d. ,,

24: The 7 462.11 wireless >A9s use ________ types of frames.

a. four

b. five

c. si3


25: 'luetooth is a _______ technology that connects devices %called gadgets& in a small area.

a. wired >A9

b. (ireless &AN

c. G>A9


!6: A 'luetooth networ$ is called a ________.

a. piconet

b. scatternet

c. bluenet


!1: 7n 'luetooth8 multiple ________ form a networ$ called a _________.

a. scatternetB piconets b. piconets scatternet

c. piconets: bluenet

d. bluenetB scatternet

!2: A 'luetooth networ$ consists of _____ primary device%s& and up to ____ secondary devices.

a. oneB five

b. fiveB three

c. twoB si3

d. one1 se%en

!!: The )TS and (TS frames in (SA@(A ____ solve the hidden station problem. The )TS and (TS

frames in (SA@(A ____ solve the e3posed station problem.

a. can1 cannot

b. cannotB can

c. canB can

d. cannotB cannot


79/188

!+: 7n 'luetooth8 the current data rate is ____bps

a. 2

b. -

c. 11


!-: 7n 'luetooth8 the _______ layer is roughly e#uivalent to the physical layer of the 7nternet model.

a. radio

b. baseband

c. >2(AP


!0: 7n 'luetooth8 the _____layer is roughly e#uivalent to the A( sublayer in >A9s.

a. radio

b. baseband c. >2(AP


!: 7n 'luetooth8 the >2(AP sublayer8 is roughly e#uivalent to the >>( sublayer in >A9s.

a. radio

b. baseband

c. &,"AP


!4: The access method in 'luetooth is ________. a. "*A

b. //-/MA

c. (*A


!5: 7n 'luetooth8 the _____ lin$ is used when avoiding latency %delay in data delivery& is more important

than integrity %errorfree delivery&.

a. S"*

b. A(>

c. A(


80/188

+6: 7n 'luetooth8 the _____ lin$ is used when data integrity is more important than avoiding latency.

a. S(


1!: An STS! frame is made of ______ rows.

a. 1

b. C

c. 2


1+: An STS! frame is made of ________ columns.

a. 5

b. 56

c. ,8>


1-: S


94/188

14: To ma$e S


95/188

2-: The ____ layer is responsible for the movement of a signal across a physical line.

a. section

b. line

c. path

d. photonic

20: The ______ layer is responsible for the movement of a signal across a physical section.

a. section

b. line

c. path

d. photonic

2: The _______ layer corresponds to the physical layer of the


96/188

a. from least significant to the most significant

b. from most significant to t$e least significant

c. two at a time

d. three at a time

!!: ach ________in a Sine overhead consists of ________ bytes.

a. 1

b. 0

c. 5

d. +

!0: The path overhead consists of ______ bytes.

a. 1

b. 0

c. C d. 14

!: 7n ________ APS8 there are normally two lines: one wor$ing line and one protection line. 'oth lines

are active all the time.

a. one-plus-one

b. onetoone

c. onetomany


!4: 7n ______ APS8 there is one wor$ing line and one protection line. The data are normally sent on the

wor$ing line until it fails.

a. oneplusone

b. one-to-one

c. onetomany



97/188

!5: 7n ________APS8 there is only one protection line for many wor$ing lines. hen a failure occurs in

one of the wor$ing lines8 the protection line ta$es control until the failed line is repaired.

a. oneplusone

b. onetoone

c. one-to-many


"2APER +

1: ________ is a virtualcircuit widearea networ$ that was designed in response to demands for a new

type of A9 in the late 1546s and early 1556s.

a. =.2-

b. !rame Relay

c. AT


2: "rame )elay provides ________.

a. PG(s

b. SG(s

c. eit$er ;a< or ;b


2-: 7n AT8 the _____ layer defines the transmission medium8 bit transmission8 encoding8 and electricaltooptical transformation.

a. p$ysical

b. AT layer

c. AA>


20: The AA> is divided into _______ sublayers.


101/188

a. t(o

b. three

c. four


2: 7n AT8 ______ is for constantbitrate data. a. AA&+

b. AA>2

c. AA>!@+

d. AA>-

24: 7n AT8 _______is for short pac$ets.

a. AA>1

b. AA&,

c. AA>!@+

d. AA>-

25: 7n AT8 _____ is for conventional pac$et switching %virtualcircuit approach or datagram approach&.

a. AA>1

b. AA>2

c. AA&3#=

d. AA>-

79(1

b. AA>2

c. AA>!@+

d. AA&7

!1: ________ technology can be adapted for use in a >A9 %AT >A9&.

a. =.2-

b. "rame )elay

c. AM


!2: 7n a _____ AT >A98 an AT switch connects stations.


102/188

a. pure

b. legacy

c. mi3ed architecture


!!: 7n a _______ AT >A98 the bac$bone that connects traditional >A9s uses AT technology. a. pure

b. legacy

c. mi3ed architecture


!+: A _______ AT >A9 combines features of a pure AT >A9 and a legacy AT >A9.

a. pure

b. legacy

c. mixed arc$itecture


"2APER +C

1: An 7Pv+ address consists of _______ bits.

a. +

b. 4

c. 3,

d. 0+

2: 7n 7Pv+8 class _______ has the greatest number of addresses in each bloc$.

a. A

b. '

c. (

d. *

!: 7dentify the class of the following 7Pv+ address: +.-.0..

a. A

b. ' c. (


+: 7dentify the class of the following 7Pv+ address: 225.1.2.!.

a. A

b. '

c. /


103/188


-: 7dentify the class of the following 7Pv+ address: 151.1.2.!.

a. A

b. B

c. ( d. none of the above

0: hat is the result of A9*ing 2-- and 1-/

a. 2--

b. +7

c. 6


: hat is the result of A9*ing 6 and 1-/

a. 2--

b. 1-

c. >


4: hat is the result of A9*ing 2-+ and 1-/

a. 2-+

b. +=

c. 6


5: hat is the result of A9*ing 152 and 0-/ a. 152

b. 0-

c. 0=


16: hich one is not a contiguous mas$/

a. 2--.2--.2--.2-+

b. 2--.2--.22+.6

c. ,77.+=.>.>

d. all are

11: The number of addresses in a class ( bloc$ is _______.

a. 0-8-!+

b. 1088210

c. ,70



104/188

12: The number of addresses in a class ' bloc$ is _______.

a. 07@730

b. 1088210

c. 2-0


1!: The number of addresses in a class A bloc$ is _______.

a. 0-8-!+

b. +0@888@,+0

c. 2-0


1+: The number of addresses assigned to an organi,ation in classless addressing _______.

a. can be any number

b. must be a multiple of 2-0

c. must be a po(er of ,


1-: The first address assigned to an organi,ation in classless addressing _______.

a. must be a power of +

b. must be e%enly di%isible by t$e number of addresses

c. must belong to one of the A8 '8 or ( classes


10: hich address could be the beginning address of a bloc$ of !2 classless addresses/

a. 2.+.0.-

b. 2.+.0.10

c. ,.=.0.0=


1: hich address could be the beginning address of a bloc$ of 10 classless addresses/

a. 2.+.0.-

b. 2.+.0.1-

c. 2.+.0.02


14: hich address could be the beginning address of a bloc$ of 2-0 classless addresses/

a. 2.+.0.-

b. 2.+.0.1-

c. ,.=.0.>


15: hat is the first address of a bloc$ of classless addresses if one of the addresses is12.2.2.0@2/
http://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F27&sa=D&sntz=1&usg=AFQjCNFeKeC_Pd7v7u-6MRnE9eNy4cVzrwhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F27&sa=D&sntz=1&usg=AFQjCNFeKeC_Pd7v7u-6MRnE9eNy4cVzrwhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F27&sa=D&sntz=1&usg=AFQjCNFeKeC_Pd7v7u-6MRnE9eNy4cVzrw


105/188

a. 12.2.2.6

b. 12.2.2.!2

c. +,.,.,.0=


26: hat is the first address of a bloc$ of classless addresses if one of the addresses is12.2.2.0@16/ a. +,.>.>.>

b. 12.2.6.6

c. 12.2.2.2


21: hat is the first address of a bloc$ of classless addresses if one of the addresses is12.2.2.12@24/

a. 12.2.2.6

b. 12.2.2.50

c. +,.,.,.++,


22: "ind the number of addresses in a bloc$ of classless addresses if one of the addresses

is 12.2.2.@2+.

a. !2

b. 0+

c. ,70 d. none of the above

2!: "ind the number of addresses in a bloc$ of classless addresses if one of the addresses

is 12.2.2.@!6.

a. 2

b. =

c. 4


2+: hat is the last address of a bloc$ of classless addresses if one of the addresses is 12.2.2.12@24/

a. 12.2.2.10

b. 12.2.2.112

c. +,.,.,.+,8


2-: hat is the last address of a bloc$ of classless addresses if one of the addresses is 12.2.2.0@!6/

a. 12.2.2.2
http://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F10&sa=D&sntz=1&usg=AFQjCNFo8VQWPHyOx9t6BtixArWQsFH4GQhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F10&sa=D&sntz=1&usg=AFQjCNFo8VQWPHyOx9t6BtixArWQsFH4GQhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.127%2F28&sa=D&sntz=1&usg=AFQjCNFdv_d2YvB14IS2S3JW4fV3VIzq2whttp://www.google.com/url?q=http%3A%2F%2F12.2.2.127%2F28&sa=D&sntz=1&usg=AFQjCNFdv_d2YvB14IS2S3JW4fV3VIzq2whttp://www.google.com/url?q=http%3A%2F%2F12.2.2.7%2F24&sa=D&sntz=1&usg=AFQjCNH5TdRvQsgWKtEkqlOospkpidFBCAhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.7%2F30&sa=D&sntz=1&usg=AFQjCNEPBaV3cGOHImILkAfZu67jPO6rXQhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.127%2F28&sa=D&sntz=1&usg=AFQjCNFdv_d2YvB14IS2S3JW4fV3VIzq2whttp://www.google.com/url?q=http%3A%2F%2F12.2.2.6%2F30&sa=D&sntz=1&usg=AFQjCNG9FoGb-Ht6GPYwj4BZs_Ss7riYZAhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.76%2F10&sa=D&sntz=1&usg=AFQjCNFo8VQWPHyOx9t6BtixArWQsFH4GQhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.127%2F28&sa=D&sntz=1&usg=AFQjCNFdv_d2YvB14IS2S3JW4fV3VIzq2whttp://www.google.com/url?q=http%3A%2F%2F12.2.2.7%2F24&sa=D&sntz=1&usg=AFQjCNH5TdRvQsgWKtEkqlOospkpidFBCAhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.7%2F30&sa=D&sntz=1&usg=AFQjCNEPBaV3cGOHImILkAfZu67jPO6rXQhttp://www.google.com/url?q=http%3A%2F%2F12.2.2.127%2F28&sa=D&sntz=1&usg=AFQjCNFdv_d2YvB14IS2S3JW4fV3VIzq2whttp://www.google.com/url?q=http%3A%2F%2F12.2.2.6%2F30&sa=D&sntz=1&usg=AFQjCNG9FoGb-Ht6GPYwj4BZs_Ss7riYZA


106/188

b. +,.,.,.0

c. +,.,.,.8


20: An organi,ation is granted a bloc$B one address is [email protected] organi,ation needs 16 subnets.

hat is the subnet prefi3 length/ a. @26

b. #,=

c. @2-


2: An organi,ation is granted a bloc$B one address is [email protected] the subnet prefi3 length is @248 wha

is the ma3imum number of subnets/

a. 2

b. + c.


24: An organi,ation is granted a bloc$ of classless addresses with the starting address155.!+.0.0+@24

Cow many addresses are granted/

a. 4

b. +0

c. !2


25: An organi,ation is granted a bloc$ of classless addresses with the starting

address 155.!+.0.124@25. Cow many addresses are granted/

a.

b. 10

c. !2


!6: An organi,ation is granted a bloc$ of classless addresses with the starting address155.!+.!2.6@2.

Cow many addresses are granted/

a. 4

b. 10 c. 3,


!1: hat is the default mas$ for class A in (7*) notation/

a. @5

b. #

c. @10
http://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F20&sa=D&sntz=1&usg=AFQjCNHAesmWOIRMCRC7C4SSX2Mye2Fl_Qhttp://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F20&sa=D&sntz=1&usg=AFQjCNHAesmWOIRMCRC7C4SSX2Mye2Fl_Qhttp://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F25&sa=D&sntz=1&usg=AFQjCNEH96TCBXwoP7OIZCCq82AS0l8VhQhttp://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F25&sa=D&sntz=1&usg=AFQjCNEH96TCBXwoP7OIZCCq82AS0l8VhQhttp://www.google.com/url?q=http%3A%2F%2F199.34.76.64%2F28&sa=D&sntz=1&usg=AFQjCNER9xGmIfVpGTepZlvwxfCZteGKUwhttp://www.google.com/url?q=http%3A%2F%2F199.34.76.64%2F28&sa=D&sntz=1&usg=AFQjCNER9xGmIfVpGTepZlvwxfCZteGKUwhttp://www.google.com/url?q=http%3A%2F%2F199.34.76.128%2F29&sa=D&sntz=1&usg=AFQjCNEshbmjB-m1eBhtgelvbyGqYzzWwghttp://www.google.com/url?q=http%3A%2F%2F199.34.32.0%2F27&sa=D&sntz=1&usg=AFQjCNGydarX6_0DOHySBJwq-AKnWgI8swhttp://www.google.com/url?q=http%3A%2F%2F199.34.32.0%2F27&sa=D&sntz=1&usg=AFQjCNGydarX6_0DOHySBJwq-AKnWgI8swhttp://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F20&sa=D&sntz=1&usg=AFQjCNHAesmWOIRMCRC7C4SSX2Mye2Fl_Qhttp://www.google.com/url?q=http%3A%2F%2F2.2.2.64%2F25&sa=D&sntz=1&usg=AFQjCNEH96TCBXwoP7OIZCCq82AS0l8VhQhttp://www.google.com/url?q=http%3A%2F%2F199.34.76.64%2F28&sa=D&sntz=1&usg=AFQjCNER9xGmIfVpGTepZlvwxfCZteGKUwhttp://www.google.com/url?q=http%3A%2F%2F199.34.76.128%2F29&sa=D&sntz=1&usg=AFQjCNEshbmjB-m1eBhtgelvbyGqYzzWwghttp://www.google.com/url?q=http%3A%2F%2F199.34.32.0%2F27&sa=D&sntz=1&usg=AFQjCNGydarX6_0DOHySBJwq-AKnWgI8sw


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!2: hat is the default mas$ for class ' in (7*) notation/

a. @5

b. @4

c. #+0 d. none of the above

!!: hat is the default mas$ for class ( in (7*) notation/

a. #,=

b. @4

c. @10


!+: 7n classless addressing8 the ______ is another name for the common part of the address range.

a. suffi3

b. prefix

c. netid


!-: 7n classless addressing8 the _______ is the varying part %similar to the hostid&.

a. suffix

b. prefi3

c. hostid


!0: 7n classless addressing8 the prefi3 length defines the _____________.

a. netid

b. hostid

c. mas)


!: 7n a bloc$8 the prefi3 length is @2+B what is the mas$/

a. ,77.,77.,77.> b. 2--.2--.2+2.6

c. 2--.2--.6.6


!4: 7n a bloc$8 the prefi3 length is @1-B what is the mas$/

a. ,77.,7=.>.>

b. 2--.2--.2--.6


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c. 2--.2--.2--.124


!5: 7n a bloc$8 the mas$ is 2--.2--.152.6B what is the prefi3 length/

a. @26

b. @24 c. #+


+6: An 7Pv0 address is _________ bits long.

a. !2

b. 0+

c. +,


+1: An 7Pv0 address consists of ________ bytes %octets&B

a. +

b. 4

c. +0


+2: To ma$e addresses more readable8 7Pv0 specifies ____________notation.

a. dotted decimal

b. $exadecimal colon

c. both a and b


+!: 7n he3adecimal colon notation8 a 124bit address is divided into _______ sections8 each _____

he3adecimal digits in length.

a. 4: 2

b. 4: !

c. =


++: An 7Pv0 address can have up to __________ colons.

a. 4

b. 8

c. +


+-: An 7Pv0 address can have up to __________ he3adecimal digits.

a. 10

b. 3,

c. 4


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+0: 7n 7Pv08 _______ address defines a single computer.

a. a unicast

b. a multicast

c. an anycast d. none of the above

+: 7n 7Pv08 ____ address defines a group of computers with addresses that have the same prefi3.

a. a unicast

b. a multicast

c. an anycast


+4: 7n 7Pv08 _________ address defines a group of computers. a. a unicast

b. a multicast

c. an anycast


+5: 7n 7Pv08 the ________ prefi3 defines the purpose of the address.

a. type

b. purpose

c. both a and b


-6: 7n 7Pv08 the___________ address is generally used by a normal host as a unicast address.

a. pro%ider-based unicast

b. lin$ local

c. site local


-1: 7n 7Pv08 a _________address comprises 46 bits of ,ero8 followed by 10 bits of one8 followed by the

!2bit 7Pv+ address.

a. lin$ local

b. site local c. mapped


-2: 7n 7Pv08 a ___________ address is an address of 50 bits of ,ero followed by !2 bits of 7Pv+ address

a. lin$ local

b. site local

c. mapped


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-!: 7n 7Pv08 a _______ address is used if a >A9 uses the 7nternet protocols but is not connected to the

7nternet for security reasons.

a. lin) local

b. site local

c. mapped


-+: 7n 7Pv08 a ______address is used if a site with several networ$s uses the 7nternet protocols but is no

connected to the 7nternet for security reasons.

a. lin$ local

b. site local

c. mapped


"2APER ,>

1: A besteffort delivery service such as 7Pv+ includes _______.

a. error chec$ing

b. error correction c. datagram ac$nowledgment


2: 7n 7Pv+ header8 an C>9 value of decimal 16 means _______.

a. there are 16 bytes of options

b. there are +6 bytes of options

c. there are 16 bytes in the header

d. t$ere are => bytes in t$e $eader

!: 7n 7Pv+8 what is the value of the total length field in bytes if the header is 24 bytes and the data field is

+66 bytes/

a. =,

b. +6

c. 16

d. +2

+: 7n 7Pv+8 what is the length of the data field given an C>9 value of 12 and total length value of


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+68666/

a. !58544

b. +68612

c. +686+4

d. 3C@C7,

-: An 7Pv+ datagram is fragmented into three smaller datagrams. hich of the following is true/

a. The EiFdo not fragmentE@iF bit is set to 1 for all three datagrams.

b. The EiFmore fragmentE@iF bit is set to 6 for all three datagrams.

c. $e identification field is t$e same for all t$ree datagrams.

d. The offset field is the same for all three datagrams.

0: 7n 7Pv+8 if the fragment offset has a value of 1668 it means that _______.

a. the datagram has not been fragmented

b. the datagram is 166 bytes in si,e

c. the first byte of the datagram is byte 166

d. t$e first byte of t$e datagram is byte >>

: 7n 7Pv+8 what is needed to determine the number of the last byte of a fragment/

a. 7dentification number

b. to 0> bytes long

b. is always 26 bytes long c. is always 06 bytes long

d. depends on the T;

5: hich of the following is a necessary part of the 7Pv0 datagram/

a. Base $eader

b. 3tension header

c. *ata pac$et from the upper layer

d. %a& and %c&

16: 7n 7Pv08 the _______ field in the base header restricts the lifetime of a datagram.

a. version

b. ne3theader

c. $op limit

d. neighboradvertisement

11: The ________ protocol is the transmission mechanism used by the T(P@7P suite.

a. A)P


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b. IP

c. )A)P


12: 7P is _________ datagram protocol.

a. an unreliable

b. a connectionless

c. bot$ a and b


1!: The term ________ means that 7P provides no error chec$ing or trac$ing. 7P assumes the

unreliability of the underlying layers and does its best to get a transmission through to its destination8 bu

with no guarantees.

a. reliable delivery

b. connectionoriented delivery c. best-effort deli%ery


1+: 7n 7Pv+8 an C>9 value of decimal 16 means _______.

a. there are 16 bytes of options

b. there are +6 bytes of options

c. t$ere are => bytes in t$e $eader


1-: 7n 7Pv+8 which field or bit value unambiguously identifies the datagram as a fragment/

a. EiF*o not fragmentE@iF bit / 6

b. EiFore "ragmentE@iF bit / 6

c. !ragment offset J +>>>


10: The 7Pv+ header si,e _______.

a. is ,> to 0> bytes long

b. is 26 bytes long

c. is 06 bytes long


1: 7n 7Pv+8 when a datagram is encapsulated in a frame8 the total si,e of the datagram must be less

than the _______.

a. ;T

b. AT

c. M



113/188

14: The 7Pv+ header field formerly $nown as the service type field is now called the _______ field.

a. 7T" b. chec$sum

c. differentiated ser%ices


15: 7n 7Pv08 options are inserted between the _________ and the ___________ data.

a. base headerB e3tension header

b. base $eader1 upper-layer data

c. base headerB frame header


26: 7Pv0 allows _________ security provisions than 7Pv+. a. more

b. less

c. the same level


21: 7n 7Pv08 when a datagram needs to be discarded in a congested networ$8 the decision is based on

the _______ field in the base header.

a. hop limit

b. priority

c. ne3t header


22: 7n 7Pv08 the _______ field in the base header and the sender 7P address combine to indicate a

uni#ue path identifier for a specific flow of data.

a. flo( label

b. ne3t header

c. hop limit

d. destination 7P address

"2APER ,+1: A _______ address is an internetwor$ address with universal Kurisdiction.

a. physical

b. logical

c. a and b


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2: The logical addresses in the 7nternet are called _______ addresses.

a. port b. IP

c. mail


!: A ________ is a local address. 7ts Kurisdiction is over a local networ$.

a. p$ysical

b. logical

c. a and b


+: 7f the sender is a host and wants to send a pac$et to another host on the same networ$8 the logicaladdress that must be mapped to a physical address is ______.

a. t$e destination IP address in t$e datagram $eader

b. the 7P address of the router found in the routing table

c. either a or b


-: 7f the sender is a host and wants to send a pac$et to another host on another networ$8 the logical

address that must be mapped to a physical address is ______.

a. the destination 7P address in the datagram header

b. t$e IP address of t$e router found in t$e routing table

c. either a or b


0: The sender is a router that has received a datagram destined for a host on another networ$. The

logical address that must be mapped to a physical address is ______.

a. the destination 7P address in the datagram header

b. t$e IP address of t$e router found in t$e routing table

c. either a or b


: The sender is a router that has received a datagram destined for a host on the same networ$. Thelogical address that must be mapped to a physical address is ______.

a. t$e destination IP address in t$e datagram $eader

b. the 7P address of the router found in the routing table

c. either a or b



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4: 7n _______8 a table associating a logical address with a physical address is updated manually.

a. static mapping

b. dynamic mapping

c. physical mapping


5: _______ is a dynamic mapping protocol in which a physical address is found for a given logical

address.

a. ARP

b. )A)P

c. both a and b


16: The target hardware address on an thernet is _______ in an A)P re#uest. a. >x>>>>>>>>>>>>

b. 6.6.6.6

c. variable

d. class dependent

11: An A)P reply is normally _______.

a. broadcast

b. multicast

c. unicast


12: An A)P re#uest is normally _______.

a. broadcast

b. multicast

c. unicast


1!: A techni#ue called ______ is used to create a subnetting effect.

a. A)P

b. )A)P

c. proxy ARP d. none of the above

1+: A _______ is an A)P that acts on behalf of a set of hosts.

a. A)P

b. )A)P

c. proxy ARP



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1-: 7(P is a _________ layer protocol.

a. data lin$

b. transport

c. net(or)


10: 7(P messages are divided into two broad categories: _____________.

a. 6uery and error reporting messages

b. re#uest and response messages

c. re#uest and reply messages


1: An 7(P message has _____ header and a variablesi,e data section.

a. a 10byte

b. a !2byte

c. an -byte


14: hich of the following is true about 7(P messages/

a. An 7(P error message may be generated for an 7(P error message.

b. An 7(P error message may be generated for each fragment.

c. An 7(P error message may be generated for a multicast datagram.

d. none is true

15: hich of the following is true about 7(P messages/

a. An 7(P error message may be generated for an 7(P error message. b. An I"MP error message may be generated only for t$e first fragment.

c. An 7(P error message may be generated for a multicast datagram.

d. none is true

26: 7P is a companion to the ______ protocol.

a. ;*P

b. T(P

c. 7(


21: 7P is _______ protocol.

a. an error reporting

b. a group management

c. a transmission



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22: 7P helps a ________ router create and update a list of loyal members related to each router

interface.

a. broadcast

b. unicast

c. multicast d. none of the above

2!: 7P operates __________.

a. locally

b. globally

c. both a and b


2+: An 7P #uery is sent from a _______ to a _______.

a. hostB host

b. hostB router

c. router1 $ost or router


2-: The _______ is used by a router in response to a received leave report.

a. general #uery message

b. special 6uery message

c. membership report


20: The least significant 2! bits in a +4bit thernet address identify a ________. a. multicast router

b. host

c. multicast group


2: The _______ field of the 7P message is all ,eros in a #uery message.

a. version

b. type

c. group address


24: A multicast message is sent from _______ to _______.

a. one sourceB one destination

b. one source1 multiple destinations

c. multiple sourcesB one destination



118/188

25: 7n networ$s that do not support physical multicast addressing8 multicasting can be accomplished

through _______.

a. mapping

b. #ueries

c. tunneling


!6: 7f four hosts on a networ$ belong to the same group8 a total of _______ sent in response to a genera

#uery message.

a. one membership report is

b. t(o members$ip reports are

c. three membership reports are


!1: 7n 7P8 a membership report is sent _______.

a. once

b. t(ice

c. three times


!2: 7n 7P8 the general #uery message ___________________ group.

a. does not define a particular

b. e3plicitly defines a

c. can define more than one


!!: An 7P pac$et is carried in an __________ pac$et. a. ;*P

b. IP

c. thernet frame


!+: The 7P pac$et that carries an 7P pac$et has a value of _______ in its protocol field.

a. !

b. ,

c. 1



119/188

"2APER ,,

1: 7n _______ delivery8 both the deliverer of the 7P pac$et and the destination are on the same networ$.

a. a connectionless

b. a direct

c. an indirect


2: 7n _______ delivery8 the deliverer of the 7P pac$et and the destination are on different networ$s.

a. a connectionoriented

b. a direct

c. an indirect


!: 7n _______ forwarding8 the full 7P address of a destination is given in the routing table.

a. ne3thop b. networ$specific

c. $ost-specific

d. default

+: 7n _______ forwarding8 the mas$ and destination addresses are both 6.6.6.6 in the routing table.

a. ne3thop

b. networ$specific

c. hostspecific

d. default

-: 7n _______ forwarding8 the destination address is a networ$ address in the routing table.

a. ne3thop

b. net(or)-specific

c. hostspecific

d. default

0: 7n _______ forwarding8 the routing table holds the address of Kust the ne3t hop instead of complete

route information.

a. next-$op

b. networ$specific

c. hostspecific d. default

: The idea of address aggregation was designed to alleviate the increase in routing table entries when

using ________.

a. classful addressing


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b. classless addressing

c. both a and b


4: The principle of ________ states that the routing table is sorted from the longest mas$ to the shortest

mas$. a. first mas$ matching

b. shortest mas$ matching

c. longest mas) matc$ing


5: The use of hierarchy in routing tables can ________ the si,e of the routing tables.

a. reduce

b. increase

c. both a and b


16: _______ deals with the issues of creating and maintaining routing tables.

a. "orwarding

b. Routing

c. *irecting


11: A _______ routing table contains information entered manually.

a. static

b. dynamic

c. hierarchical d. none of the above

12: A _______ routing table is updated periodically using one of the dynamic routing protocols.

a. static

b. dynamic

c. hierarchical


1!: The input and output ports of a router perform the ________ layer functions of the router.

a. p$ysical and data lin)

b. networ$

c. transport


1+: The routing processor of a router performs the ________ layer functions of the router.

a. physical and data lin$

b. net(or)


121/188

c. transport


1-: The tas$ of moving the pac$et from the input #ueue to the output #ueue in a router is done by

_________.

a. input and output ports b. routing processor

c. s(itc$ing fabrics


10: A static table is one _______.

a. (it$ manual entries

b. which is updated automatically

c. either a or b


1: A dynamic table is one _______.

a. with manual entries

b. ($ic$ is updated automatically

c. either a or b


14: "or purposes of routing8 the 7nternet is divided into ___________.

a. wide area networ$s

b. autonomous networ$s

c. autonomous systems


15: ____________ is a group of networ$s and routers under the authority of a single administration.

a. An autonomous system

b. An area

c. a and b


26: )outing inside an autonomous system is referred to as _______________.

a. interdomain routing

b. intradomain routing

c. both a and b


21: )outing between autonomous systems is referred to as ____________.

a. interdomain routing

b. intradomain routing

c. both a and b


122/188


22: 7n _______ routing8 the least cost route between any two nodes is the route with the minimum

distance.

a. path vector

b. distance %ector c. lin$ state


2!: 7n ________8 each node maintains a vector %table& of minimum distances to every node.

a. path vector

b. distance %ector

c. lin$ state


2+: 7n distance vector routing8 each node periodically shares its routing table with _________ and

whenever there is a change.

a. every other node

b. its immediate neig$bors

c. one neighbor


2-: The )outing 7nformation Protocol %)7P& is an intradomain routing based on _________ routing.

a. distance %ector

b. lin$ state

c. path vector


20: The metric used by _______ is the hop count.

a.


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24: The


124/188

!+: 7n ________ routing8 we assume that there is one node %or more& in each autonomous system that

acts on behalf of the entire autonomous system.

a. distant vector

b. pat$ %ector

c. lin$ state


!-: ___________ is an interdomain routing protocol using path vector routing.

a. BHP

b. )7P

c.


125/188

+6: A onetoone communication between one source and one destination is classified as a _______

communication.

a. unicast

b. multicast

c. broadcast


+1: 7n ______8 the router forwards the received pac$et through only one of its interfaces.

a. unicasting

b. multicasting

c. broadcasting


+2: 7n _______8 the router may forward the received pac$et through several of its interfaces.

a. unicasting

b. multicasting

c. broadcasting


+!: mulation of ________ through ___________ is not efficient and may create long delays.

a. unicastingB multiple unicasting

b. multicasting1 multiple unicasting

c. broadcastingB multicasting


++: 7n unicast routing8 each router in the domain has a table that defines a ______ path tree to possible

destinations. a. average

b. longest

c. s$ortest


+-: 7n multicast routing8 each involved router needs to construct a ________ path tree for each group.

a. average

b. longest

c. s$ortest


+0: 7n the _______ tree approach8 each router needs to have one shortest path tree for each group.


126/188

a. groupshared

b. source-based

c. a or b


+: 7n the groupshared tree approach8 _________ involved in multicasting. a. only t$e core router is

b. all routers are

c. only some routers are


+4: ulticast lin$ state routing uses the _______ tree approach.

a. source-based

b. groupshared

c. a or b


+5: The ulticast


127/188

c. average


-!: )P" eliminates the ________ in the flooding process.

a. forwarding

b. bac$warding

c. flooding


-+: )P" guarantees that each networ$ receives only ____ of the multicast pac$et.

a. one copy

b. two copies

c. a or b


--: )P' creates a shortest path _______ tree from the source to each destination. a. unicast

b. multicast

c. broadcast


-0: )P' guarantees that each destination receives _________ of the pac$et.

a. one copy

b. no copies

c. multiple copies


-: 7n ________8 the multicast pac$et must reach only those networ$s that have active members for tha

particular group.

a. )P"

b. )P'

c. RPM d. none of the above

-4: _______ adds pruning and grafting to _______ to create a multicast shortest path tree that supports

dynamic membership changes.

a. RPM1 RPB

b. )P'B )P

c. )P": )P


128/188


-5: __________ is an implementation of multicast distance vector routing. 7t is a sourcebased routing

protocol8 based on )7P.

a.


129/188

0-: P7* is used in a _______ multicast environment8 such as a >A9.

a. dense

b. sparse

c. a or b


00: P7S is used in a _______multicast environment such as a A9.

a. dense

b. sparse

c. a or b


0: 7n _______8 a logical tunnel is established by encapsulating the multicast pac$et inside a unicast

pac$et.

a. ;97'T'


130/188

b. ;ser *atagram Procedure

c. ser /atagram Protocol


-: Although there are several ways to achieve processtoprocess communication8 the most common is

through the __________ paradigm. a. client-ser%er

b. clientclient

c. serverserver


0: The local host and the remote host are defined using 7P addresses. To define the processes8 we need

second identifiers called ____________.

a. ;*P addresses

b. transport addresses

c. port addresses


: The ports ranging from +581-2 to 0-8-!- can be used as temporary or private port numbers. They are

called the ________ ports.

a. well$nown

b. registered

c. dynamic


4: 7n the sending computer8 ;*P receives a data unit from the _______ layer.

a. application

b. transport

c. 7P


5: 7n the sending computer8 ;*P sends a data unit to the _______ layer.

a. application

b. transport c. IP


16: ;*P and T(P are both _______ layer protocols.

a. data lin$

b. networ$

c. transport


131/188


11: hich of the following functions does ;*P perform/

a. process-to-process communication

b. hosttohost communication

c. endtoend reliable data delivery d. none of the above

12: hen the 7P layer of a receiving host receives a datagram8 _______.

a. delivery is complete

b. a transport layer protocol ta)es o%er

c. a header is added


1!: ;*P needs the _______ address to deliver the user datagram to the correct application process.

a. port

b. application

c. internet


1+: A port address in ;*P is _______bits long.

a. 4

b. +0

c. !2

d. any of the above

1-: hich of the following does ;*P guarantee/ a. flow control

b. connectionoriented delivery

c. flow control


10: The source port address on the ;*P user datagram header defines _______.

a. the sending computer

b. the receiving computer

c. t$e process running on t$e sending computer


1: The combination of an 7P address and a port number is called a ____________.

a. transport address

b. networ$ address

c. soc)et address



132/188

14: To use the services of ;*P8 we need ________ soc$et addresses.

a. four

b. t(o

c. three


15: ;*P pac$ets are called __________.

a. user datagrams

b. segments

c. frames


26: ;*P pac$ets have a fi3edsi,e header of _______ bytes.

a. 10

b.

c. +6


21: ;*P pac$ets are encapsulated in ___________.

a. an thernet frame

b. an T(P segment

c. an IP datagram


22: ;*P uses ________ to handle outgoing user datagrams from multiple processes on one host.

a. flow control

b. multiplexing

c. demultiple3ing


2!: ;*P uses _______ to handle incoming user datagrams that go to different processes on the same

host.

a. flow control

b. multiple3ing

c. demultiplexing


2+: T(P is a __________protocol.

a. stream-oriented

b. messageoriented

c. bloc$oriented



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2-: T(P allows the sending process to deliver data as a _______of bytes and allows the receiving

process to obtain data as a _________ of bytes.

a. messageB message

b. stream1 stream

c. bloc$B bloc$


20: 'ecause the sending and the receiving processes may not write or read data at the same speed8

T(P ________.

a. speeds up the slower process

b. slows down the faster process

c. uses buffers


2: T(P groups a number of bytes together into a pac$et called a ___________.

a. user datagram

b. segment

c. datagram


24: T(P is a ___________ protocol.

a. connection-oriented

b. connectionless

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Fourozan MCQ From 4th Edition