,https://www.stuvia.com/
Chapter 1 m
Introduction to Data Communications
m m m
True-False Questions
m
ThemfollowingmarempossiblemTrue/Falsemquestionsmformtests.mThemstatementmismgiven mand mthemansw
ermismprovided min msquarembrackets.mThemlevelmof mdifficulty m(easy,mmoderate,mdifficult)mand mthempa
gemnumber(s)mrelevantmto mthemtopicmaremalso mfurnished.
1. AccordingmtomJohn mChambers,mCEOmofmCiscom(amleadingmnetworkingmtechnologymcompan
y),mtheminformation magemismthemsecond mIndustrialmRevolution.
Answer:True Difficulty:mEasy Reference:m p.m4
2. Duemto mrecentmadvancesminmhigh mspeedmcommunication mnetworks,mtheminformation mlag,morm
themtimemitmtakesmforminformation mtombemdisseminatedmaroundmthemworld,mhasmbeen msignifi
cantly mshortened.
Answer:True Difficulty:m Easy Reference:m p.4
3. Onemperspectivemofmdatamcommunicationsmand mnetworkingmasmstated min mthemtextbook,mexami
nesmthemmanagementmofmnetworkingmtechnologies,mincludingmsecurity,mnetworkmdesign,mand
mmanagingmthe mnetwork mon ma mday-to-day mbasis mand mlongmterm mbasis.
Answer:True Difficulty:m Moderate Reference:m p.m5
4. ThemfirstmelectronicmdatamcommunicationmsystemmwasmthemtelephonemdevelopedmbymAlexan
dermGraham mBell.
Answer:False Difficulty:mEasy Reference:m p.m5
5. Themfirstmtranscontinentalmtelephone mservicemwasmestablished min mthem1940s.
Answer:False Difficulty:mEasy Reference:m p.m6
6. An mInter-
Exchange mCarrierm(IXC)mprovidesmonlymlocalmtelephonemservicesmto mhomesmandmbusin
esses.
Answer:m False Difficulty:m Easy Reference:m p.m6
7. Common mcarriersminclude mthemRBOCs,mIXCs,mand mCablemTVmcompanies.
Answer:True Difficulty:mModerate Reference:m p.m7
8. ThemTelecommunicationsmActmofm1996mnowmpermitsmthemRBOCsmtomprovidemlongmdista
ncemoutside mthemregion min mwhich mthey mprovidemlocalmtelephone mservices.
Answer:mTrue Difficulty:mModerate Reference:m p.m7
9. ThemInternetmwasmstartedmbymthemU.S.mDepartmentmofmdefenseminm1969 masmamnetworkmofm
fourmcomputersmcalled mARPANET.
Answer:mTrue Difficulty:m Moderate Reference:m p.m9
10. Telecommunicationsmismthemtransmissionmofmvoicemandmvideomasmwellmasmdatamandmimp
liesmtransmittingmamlongermdistance mthan min mamdatamcommunication mnetwork.
Answer:False Difficulty:mModerate Reference:m p.m11
,https://www.stuvia.com/
11. Amlocalmareamnetworkm(LAN)mconnectsmothermLANsmand mBNsmlocatedminmdifferentmareasmtome
ach mothermand mto mwidemareamnetworksmin mamspan mfromm3 mto m30 mmiles.
Answer:mFalse Difficulty:mModerate Reference:m p.m13
12. An mintranetmismamLANmthatmusesmInternetmtechnologiesmandmismpublicly mavailable mto mpe
oplemoutside mof mthemorganization.
Answer:mFalse Difficulty:mModerate Reference:m p.m15
13. Amcarmmanufacturermmaymgivemaccessmtomcertainmportionsmofmitsmnetworkmto msomemofmitsmsupp
liersmviamInternet.mThismisman mexample mof man mExtranet.
Answer:mTrue Difficulty:mModerate Reference:m p.m15
14. ThemOSImmodelmismthemmostmwidelymusedmnetworkmmodelmtomdevelop mand mbuild mnetworksmtoday.
Answer:mTrue Difficulty:mModerate Reference:m p.m16
15. Themnetwork mlayermismresponsiblemformroutingmmessagesmfrommthemsourcemcomputermtom
themdestination mcomputer.
Answer:mTrue Difficulty:mEasy Reference:m p.m17
16. In mthemOSImmodel,mthemapplication mlayermismthemend muser’smaccessmto mthemnetwork.
Answer:mTrue Difficulty:mModerate Reference:m p.m18
17. ThemapplicationmlayermismthemseventhmlayermofmthemInternetmmodelmandmprovidesmthemendmus
er’smaccessmto mthemnetwork.
Answer:mTrue Difficulty:mModerate Reference:m p.m18
18. AtmthemtransportmlayerminmthemInternetmmodel,mTCPmismresponsiblemformbreakingmlargemfilesmr
eceived mfrommthemapplicationmlayermintomsmallermpacketsmandmopeningmamconnection mto mamser
vermformtransferringmthempackets.
Answer:mTrue Difficulty:mDifficult Reference:m p.m17
19. Ethernetmisman mexample mof mamnetwork mlayermprotocol.
Answer:mFalse Difficulty:mEasy Reference:m p.m17
20. Datamcommunication mstandardsmenablemeachmlayermin mthemsendingmcomputermtomcommunic
atemwith mitsmcorrespondingmlayermin mthemreceivingmcomputer.
Answer:mTrue Difficulty:mEasy Reference:m p.m22
21. Themspecification mstagemofmthemformalmstandardization mprocessmconsistsmofmdevelopi
ngmnomenclature mand midentifyingmthemproblemsmto mbemaddressed.
Answer:mTrue Difficulty:mModerate Reference:m p.m23
22. ANSImismamvotingmparticipantmin mthemISO.
Answer:mTrue Difficulty:mEasy Reference:m p.m23
23. Passive mopticalmnetworking,mamkeymtrend mformthemfuture,mmeansmthatmvirtually manymcomputerm
willmbemablemto mcommunicate mwith many mothermcomputermin mthemworld.
Answer:mFalse Difficulty:mModerate Reference:m p.m26
,https://www.stuvia.com/
24. Themhigh mbandwidth mrequirementsm(high mcommunicationsmneeds)mformvideo mhavemslowedm
itsmintegration minto mcomputermnetworks.
Answer:mTrue Difficulty:mModerate Reference:m p.m28
25. An mApplicationmServicemProviderm(ASP)mdevelopsmamspecificmsystemmand mcompaniesmpurch
asemormrentmthemservicemwithoutminstallingmthemsystem mon mtheirmown mcomputers.
Answer:mTrue Difficulty:mModerate Reference:m p.m29
MULTIPLE CHOICE m
Themfollowingmarempossiblemmultiple-
choicemquestionsmformtests.mThemquestion mismposed mand mthemanswermismprovided mundermthemchoices
.mThemlevelmof mdifficulty m(easy,mmoderate,mdifficult)mand mthempagemnumber(s)mrelevantmto mthemtopi
cmismalso mfurnished.
1. Datamcommunicationsmand mnetworkingmcan mbemconsidered masmamglobalmareamof mstudy mbecause:
a. newm technologiesm andm applicationsm emergem fromm am variety m ofm countriesm andm spre
ad maround mthemworld
b. themtechnologiesmenablemglobalmcommunication
c. thempoliticalmand mregulatory missuesmaremexactly mthemsamemin mevery mcountry
d. amand mb
e. nonemof mthemabove
Answer:mD Difficulty:mEasy Reference:m p.m4
2. In m1970,mamkey mdecision mregardingmMCI:
a. setmup mthemTelecommunications mCompetition mand mDeregulation mAct
b. permitted mMCImto mprovide mlimited mlongmdistance mservicemin mthemU.S.
c. permitted mtelephonemand/ormcomputermequipmentmthatmwasmnotmmanufacturedmby mBel
lmTelephone mto mbemconnected mto mAT&T’smnetwork
d. divided mAT&Tmintomtwomparts:monempartmformlongmdistancemservice,mandmamsecond mpa
rt,mcomprised mof mseven moperatingmcompanies, mformlocalmtelephone mservice
e. setmup mderegulation mforminternationalmtelecommunications mmarketsmin m68 mcountries
Answer:mB Difficulty:mEasy Reference:m m p.m6
3. In m1984,mamfederalmjudgembrokemup mamhighly mcontested mtelephone mservicemmonopoly mand:
a. setmup mthemTelecommunications mCompetition mand mDeregulation mAct
b. permitted mMCImto mprovidemlimited mlongmdistancemservicemin mthemU.S.
c. permitted mtelephonemand/ormcomputermequipmentmthatmwasmnotmmanufactured mby
mBellmTelephone mto mbe mconnected mto mAT&T’s mnetwork
d. divided mAT&Tminto mtwo mparts:monempartmformlongmdistance mservice,mand mamsecon
d mpart,mcomprised mof mseven mregionalmoperatingmcompanies,mformlocalmtelephonems
ervice
e. setmup mderegulation mforminternationalmtelecommunications mmarketsmin m68 mcountries
Answer:mD Difficulty:mEasy Reference:m p.m6
Chapter 1 m
Introduction to Data Communications
m m m
True-False Questions
m
ThemfollowingmarempossiblemTrue/Falsemquestionsmformtests.mThemstatementmismgiven mand mthemansw
ermismprovided min msquarembrackets.mThemlevelmof mdifficulty m(easy,mmoderate,mdifficult)mand mthempa
gemnumber(s)mrelevantmto mthemtopicmaremalso mfurnished.
1. AccordingmtomJohn mChambers,mCEOmofmCiscom(amleadingmnetworkingmtechnologymcompan
y),mtheminformation magemismthemsecond mIndustrialmRevolution.
Answer:True Difficulty:mEasy Reference:m p.m4
2. Duemto mrecentmadvancesminmhigh mspeedmcommunication mnetworks,mtheminformation mlag,morm
themtimemitmtakesmforminformation mtombemdisseminatedmaroundmthemworld,mhasmbeen msignifi
cantly mshortened.
Answer:True Difficulty:m Easy Reference:m p.4
3. Onemperspectivemofmdatamcommunicationsmand mnetworkingmasmstated min mthemtextbook,mexami
nesmthemmanagementmofmnetworkingmtechnologies,mincludingmsecurity,mnetworkmdesign,mand
mmanagingmthe mnetwork mon ma mday-to-day mbasis mand mlongmterm mbasis.
Answer:True Difficulty:m Moderate Reference:m p.m5
4. ThemfirstmelectronicmdatamcommunicationmsystemmwasmthemtelephonemdevelopedmbymAlexan
dermGraham mBell.
Answer:False Difficulty:mEasy Reference:m p.m5
5. Themfirstmtranscontinentalmtelephone mservicemwasmestablished min mthem1940s.
Answer:False Difficulty:mEasy Reference:m p.m6
6. An mInter-
Exchange mCarrierm(IXC)mprovidesmonlymlocalmtelephonemservicesmto mhomesmandmbusin
esses.
Answer:m False Difficulty:m Easy Reference:m p.m6
7. Common mcarriersminclude mthemRBOCs,mIXCs,mand mCablemTVmcompanies.
Answer:True Difficulty:mModerate Reference:m p.m7
8. ThemTelecommunicationsmActmofm1996mnowmpermitsmthemRBOCsmtomprovidemlongmdista
ncemoutside mthemregion min mwhich mthey mprovidemlocalmtelephone mservices.
Answer:mTrue Difficulty:mModerate Reference:m p.m7
9. ThemInternetmwasmstartedmbymthemU.S.mDepartmentmofmdefenseminm1969 masmamnetworkmofm
fourmcomputersmcalled mARPANET.
Answer:mTrue Difficulty:m Moderate Reference:m p.m9
10. Telecommunicationsmismthemtransmissionmofmvoicemandmvideomasmwellmasmdatamandmimp
liesmtransmittingmamlongermdistance mthan min mamdatamcommunication mnetwork.
Answer:False Difficulty:mModerate Reference:m p.m11
,https://www.stuvia.com/
11. Amlocalmareamnetworkm(LAN)mconnectsmothermLANsmand mBNsmlocatedminmdifferentmareasmtome
ach mothermand mto mwidemareamnetworksmin mamspan mfromm3 mto m30 mmiles.
Answer:mFalse Difficulty:mModerate Reference:m p.m13
12. An mintranetmismamLANmthatmusesmInternetmtechnologiesmandmismpublicly mavailable mto mpe
oplemoutside mof mthemorganization.
Answer:mFalse Difficulty:mModerate Reference:m p.m15
13. Amcarmmanufacturermmaymgivemaccessmtomcertainmportionsmofmitsmnetworkmto msomemofmitsmsupp
liersmviamInternet.mThismisman mexample mof man mExtranet.
Answer:mTrue Difficulty:mModerate Reference:m p.m15
14. ThemOSImmodelmismthemmostmwidelymusedmnetworkmmodelmtomdevelop mand mbuild mnetworksmtoday.
Answer:mTrue Difficulty:mModerate Reference:m p.m16
15. Themnetwork mlayermismresponsiblemformroutingmmessagesmfrommthemsourcemcomputermtom
themdestination mcomputer.
Answer:mTrue Difficulty:mEasy Reference:m p.m17
16. In mthemOSImmodel,mthemapplication mlayermismthemend muser’smaccessmto mthemnetwork.
Answer:mTrue Difficulty:mModerate Reference:m p.m18
17. ThemapplicationmlayermismthemseventhmlayermofmthemInternetmmodelmandmprovidesmthemendmus
er’smaccessmto mthemnetwork.
Answer:mTrue Difficulty:mModerate Reference:m p.m18
18. AtmthemtransportmlayerminmthemInternetmmodel,mTCPmismresponsiblemformbreakingmlargemfilesmr
eceived mfrommthemapplicationmlayermintomsmallermpacketsmandmopeningmamconnection mto mamser
vermformtransferringmthempackets.
Answer:mTrue Difficulty:mDifficult Reference:m p.m17
19. Ethernetmisman mexample mof mamnetwork mlayermprotocol.
Answer:mFalse Difficulty:mEasy Reference:m p.m17
20. Datamcommunication mstandardsmenablemeachmlayermin mthemsendingmcomputermtomcommunic
atemwith mitsmcorrespondingmlayermin mthemreceivingmcomputer.
Answer:mTrue Difficulty:mEasy Reference:m p.m22
21. Themspecification mstagemofmthemformalmstandardization mprocessmconsistsmofmdevelopi
ngmnomenclature mand midentifyingmthemproblemsmto mbemaddressed.
Answer:mTrue Difficulty:mModerate Reference:m p.m23
22. ANSImismamvotingmparticipantmin mthemISO.
Answer:mTrue Difficulty:mEasy Reference:m p.m23
23. Passive mopticalmnetworking,mamkeymtrend mformthemfuture,mmeansmthatmvirtually manymcomputerm
willmbemablemto mcommunicate mwith many mothermcomputermin mthemworld.
Answer:mFalse Difficulty:mModerate Reference:m p.m26
,https://www.stuvia.com/
24. Themhigh mbandwidth mrequirementsm(high mcommunicationsmneeds)mformvideo mhavemslowedm
itsmintegration minto mcomputermnetworks.
Answer:mTrue Difficulty:mModerate Reference:m p.m28
25. An mApplicationmServicemProviderm(ASP)mdevelopsmamspecificmsystemmand mcompaniesmpurch
asemormrentmthemservicemwithoutminstallingmthemsystem mon mtheirmown mcomputers.
Answer:mTrue Difficulty:mModerate Reference:m p.m29
MULTIPLE CHOICE m
Themfollowingmarempossiblemmultiple-
choicemquestionsmformtests.mThemquestion mismposed mand mthemanswermismprovided mundermthemchoices
.mThemlevelmof mdifficulty m(easy,mmoderate,mdifficult)mand mthempagemnumber(s)mrelevantmto mthemtopi
cmismalso mfurnished.
1. Datamcommunicationsmand mnetworkingmcan mbemconsidered masmamglobalmareamof mstudy mbecause:
a. newm technologiesm andm applicationsm emergem fromm am variety m ofm countriesm andm spre
ad maround mthemworld
b. themtechnologiesmenablemglobalmcommunication
c. thempoliticalmand mregulatory missuesmaremexactly mthemsamemin mevery mcountry
d. amand mb
e. nonemof mthemabove
Answer:mD Difficulty:mEasy Reference:m p.m4
2. In m1970,mamkey mdecision mregardingmMCI:
a. setmup mthemTelecommunications mCompetition mand mDeregulation mAct
b. permitted mMCImto mprovide mlimited mlongmdistance mservicemin mthemU.S.
c. permitted mtelephonemand/ormcomputermequipmentmthatmwasmnotmmanufacturedmby mBel
lmTelephone mto mbemconnected mto mAT&T’smnetwork
d. divided mAT&Tmintomtwomparts:monempartmformlongmdistancemservice,mandmamsecond mpa
rt,mcomprised mof mseven moperatingmcompanies, mformlocalmtelephone mservice
e. setmup mderegulation mforminternationalmtelecommunications mmarketsmin m68 mcountries
Answer:mB Difficulty:mEasy Reference:m m p.m6
3. In m1984,mamfederalmjudgembrokemup mamhighly mcontested mtelephone mservicemmonopoly mand:
a. setmup mthemTelecommunications mCompetition mand mDeregulation mAct
b. permitted mMCImto mprovidemlimited mlongmdistancemservicemin mthemU.S.
c. permitted mtelephonemand/ormcomputermequipmentmthatmwasmnotmmanufactured mby
mBellmTelephone mto mbe mconnected mto mAT&T’s mnetwork
d. divided mAT&Tminto mtwo mparts:monempartmformlongmdistance mservice,mand mamsecon
d mpart,mcomprised mof mseven mregionalmoperatingmcompanies,mformlocalmtelephonems
ervice
e. setmup mderegulation mforminternationalmtelecommunications mmarketsmin m68 mcountries
Answer:mD Difficulty:mEasy Reference:m p.m6
