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ITN 100 Exam Chapter 1-4 Study Guide Questions With 100% Correct Answers
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ITN 100 Exam Chapter 1-4 Study Guide Questions With 100% Correct Answers
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ITN 100 Exam Chapter 1-4 Study GuideQuestions With 100% Correct Answers
1.iHowicanidataicommunicationinetworksiaffectibusinesses?i-
iCorrectiAnswer-
Dataicommunicationinetworksicaniaffectibusinessesibyibeingitheifound
ationsiforidistributedisystemsiiniwhichiinformationisystemiapplicationsi
areidividediamongiainetworkioficomputers.iDataicommunicationinetwo
rksifacilitateimoreiefficientiuseioficomputersiandiimproveitheiday-to-
dayicontroliofiaibusinessibyiprovidingifasteriinformationiflow,iaidingistr
ategicicompetitiveiadvantage.iTheyialsoiprovideimessageitransferiservic
esitoiallowicomputeriusersitoitalkitoioneianotheriviaielectronicimail.
2.iDiscussithreeiimportantiapplicationsiofidataicommunicationinetwork
siinibusinessiandipersonaliuse.i-iCorrectiAnswer-
Threeiimportantiapplicationsiofidataicommunicationinetworksiinibusin
essiandipersonaliuseiincludeiemail,ivideoconferencing,ianditheiInternet.
3.iHowidoiLANsidifferifromiWANs,iandiBNs?i-iCorrectiAnswer-
AiLocaliAreaiNetworki(LAN)iisiaigroupiofimicrocomputersioriterminalsilo
catediinitheisameigeneraliarea.iAiBackboneiNetworki(BN)iisiailargeicentr
alinetworkithaticonnectsimostieverythingioniaisingleicompanyisite.iAiMe
tropolitaniAreaiNetworki(MAN)iencompassesiaicityioricountyiarea.iAiWi
deiAreaiNetworki(WAN)ispansicities,istates,iorinationaliboundaries.iTypi
cally,iMANsiandiWANsiusedileasedifacilities,iwhileiLANsiandiBNsiareioft
enilocatediinternallyiinianiorganizationiandiusediownedifacilities.
,4.iWhatiisiaicircuit?i-iCorrectiAnswer-
Theicircuitiisitheipathwayithroughiwhichitheimessagesitravel.iIticanibeim
adeiupiofiaicopperiwire,ialthoughifiberiopticicableiandiwirelessitransmis
sioniareibecomingimoreicommon.iAicircuiticanialsoipassiacrossimanyityp
esiofiphysicalifacilitiesisuchiasicopperiwireiorifiberiopticicable,ibutitheisin
gleiend-to-
endiconnection,inoimatteriwhatitheiequipment,iisireferreditoiasitheicirc
uit.iThereiareimanyidevicesialongitheicircuit'sipathithatiperformispecialif
unctionsisuchiasihubs,iswitches,irouters,iandigateways.
5.iWhatiisiaiclient?i-iCorrectiAnswer-
Theiclientiisitheiinputiorioutputihardwareideviceiatitheiotheriendiofiaico
mmunicationicircuit.iItitypicallyiprovidesiremoteiusersiwithiaccessitoith
einetworkianditheidataiandisoftwareionitheiserver.
6.iWhatiisiaiserver?i-iCorrectiAnswer-
Theiserveristoresidataiorisoftwareithaticanibeiaccessedibyitheiclients,iori
remoteiusersiofiaihardwareiinputiorioutputidevice.iIniclient-
servericomputing,iseveraliserversimayiworkitogetherioveritheinetworkit
oisupportitheibusinessiapplication.
7.iWhyiareinetworkilayersiimportant?i-iCorrectiAnswer-
Communicationinetworksiareioftenibrokeniintoiaiseriesiofilayers,ieachio
fiwhichicanibeidefinediseparately,itoienableivendorsitoidevelopisoftwar
eiandihardwareithaticaniworkitogetheriinitheioverallinetwork.iTheseilay
ersienableisimplicityiinidevelopmentiandialsoiinitheicomprehensioniofic
omplexinetworks.iInitheiend,itheistrategyiofiusingimoreisimplisticinetwo
rkilayersiallowsivastlyidifferentikindsiofiequipmentitoibeiableitoihaveico
,nnectivityioveriaicommoniplatformiorinetwork,iusingiprotocolsiandistan
dardsithatiareiapplicableitoieachinarrowisliceiofitheinetwork.
8.iDescribeitheisevenilayersiinitheiOSIinetworkimodeliandiwhatitheyido.i
-iCorrectiAnswer-
Theiapplicationilayeriisitheiapplicationisoftwareiusedibyitheinetworkius
er.iTheipresentationilayeriformatsitheidataiforipresentationitoitheiuserib
yiaccommodatingidifferentiinterfacesionidifferentiterminalsioricompute
rsisoitheiapplicationiprogramineedinotiworryiaboutithem.iTheisessionila
yeriisiresponsibleiforiinitiating,imaintaining,ianditerminatingieachilogica
lisessionibetweeniendiusers.iTheitransportilayeridealsiwithiend-to-
endiissues,isuchiasiproceduresiforienteringiandidepartingifromitheinetw
ork,ibyiestablishing,imaintaining,ianditerminatingilogicaliconnectionsifo
ritheitransferiofidataibetweenitheioriginalisenderianditheifinalidestinati
oniofitheimessage.iTheinetworkilayeritakesitheimessageigeneratedibyith
eiapplicationilayeriandiifinecessary,ibreaksiitiintoiseveralismallerimessag
es.iItitheniaddressesitheimessage(s)iandideterminesitheirirouteithroughi
theinetwork,iandirecordsimessageiaccountingiinformationibeforeipassi
ngiititoitheidatailinkilayer.iTheidatailinkilayeriformatsitheimessageitoiindi
cateiwhereiitistartsiandiends,idecidesiwhenitoitransmitiitioveritheiphysic
alimedia,iandidetectsiandicorrectsianyierrorsithatioccuriinitransmission.i
Theiphysicalilayeriisitheiphysicaliconnectionibetweenitheisenderiandirec
eiver,iincludingitheihardwareidevicesi(e.g.,icomputers,iterminals,iandim
odems)iandiphysicalimediai(e.g.,icables,iandisatellites).
9.iDescribeitheifiveilayersiinitheiInternetinetworkimodeliandiwhatitheyid
o.i-iCorrectiAnswer-
Theiapplicationilayeriisitheiapplicationisoftwareiusedibyitheinetworkius
er.iTheitransportilayeridealsiwithiend-to-
, endiissues,isuchiasiproceduresiforienteringiandidepartingifromitheinetw
ork,ibyiestablishing,imaintaining,ianditerminatingilogicaliconnectionsifo
ritheitransferiofidataibetweenitheioriginalisenderianditheifinalidestinati
oniofitheimessage.iTheinetworkilayeritakesitheimessageigeneratedibyith
eiapplicationilayeriandiifinecessary,ibreaksiitiintoiseveralismallerimessag
es.iItitheniaddressesitheimessage(s)iandideterminesitheirirouteithroughi
theinetwork,iandirecordsimessageiaccountingiinformationibeforeipassi
ngiititoitheidatailinkilayer.iTheidatailinkilayeriformatsitheimessageitoiindi
cateiwhereiitistartsiandiends,idecidesiwhenitoitransmitiitioveritheiphysic
alimedia,iandidetectsiandicorrectsianyierrorsithatioccuriinitransmission.i
Theiphysicalilayeriisitheiphysicaliconnectionibetweenitheisenderiandirec
eiver,iincludingitheihardwareidevicesi(e.g.,icomputers,iterminals,iandim
odems)iandiphysicalimediai(e.g.,icables,iandisatellites).
10.iExplainihowiaimessageiisitransmittedifromioneicomputeritoianotheri
usingilayer.i-iCorrectiAnswer-
Theiapplicationilayeriisitheiapplicationisoftwareiusedibyitheinetworkius
er.iTheitransportilayeriisiresponsibleiforiobtainingitheiaddressiofitheiend
iuseri(ifineeded),ibreakingiailargeidataitransmissioniintoismalleripacketsi
(ifineeded),iensuringithatiallitheipacketsihaveibeenireceived,ieliminating
iduplicateipackets,iandiperformingiflowicontrolitoiensureithatinoicompu
teriisioverwhelmedibyitheinumberiofimessagesiitireceives.iTheinetworkil
ayeritakesitheimessageigeneratedibyitheiapplicationilayeriandiifinecessa
ry,ibreaksiitiintoiseveralismallerimessages.iItitheniaddressesitheimessag
e(s)iandideterminesitheirirouteithroughitheinetwork,iandirecordsimessa
geiaccountingiinformationibeforeipassingiititoitheidatailinkilayer.iTheida
tailinkilayeriformatsitheimessageitoiindicateiwhereiitistartsiandiends,ide
cidesiwhenitoitransmitiitioveritheiphysicalimedia,iandidetectsiandicorrec
tsianyierrorsithatioccuriinitransmission.iTheiphysicalilayeriisitheiphysicali
connectionibetweenitheisenderiandireceiver,iincludingitheihardwareide
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