WGU D315 Network and Security- Foundations- Exam Questions and Answers 100% Correct

WGU D315 Network and Security-
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Foundations-
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Exam Questions and Answers 100% Corre
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TCP/IPn-nANSWER-TransmissionnControlnProtocol/InternetnProtocol

ApplicationnLayern-nANSWER-
Thisnlayernisnresponsiblenfornthencommunicationnprotocolsnbetweennnodes.nThenprotocolsni
nnthisnlayernincludenhypertextntransfernprotocoln(HTTPnandnHTTPS),nSecurenShelln(SSH),na
ndnnetworkntimenprotocoln(NTP),namongnmanynothers.

TransportnLayern-nANSWER-Thisnlayernisnresponsiblenfornthenend-to-
endntransportnofndata.nThenprotocolsnthatnliveninnthisnlayernarentransmissionncontrolnprotocol
n(TCP)nandnuserndatagram nprotocoln(UDP).




NetworknLayern-nANSWER-
Thisnlayerndefinesnthenlogicalntransmissionnprotocolsnfornthenwholennetwork.nThenmainnprot
ocolsnthatnliveninnthisnlayernareninternetnprotocoln(IP),ninternetncontrolnmessagenprotocoln(IC
MP),nandnaddressnresolutionnprotocoln(ARP).

NetworkninterfacenLayern-nANSWER-
Thisnlayernestablishesnhowndatanshouldnbenphysicallynsentnthroughnthennetwork.

OSInModeln-nANSWER-OpennSystemsnInterconnectionnModel

PhysicalnLayern(Layern1)n-nANSWER-
Thisnlayernisnresponsiblenfornthenphysicalnconnectionsnofnthendevicesninnthennetwork.nThisnl
ayernisnimplementednthroughnthenusenofndevicesnsuchnasnhubs,nrepeaters,nmodemndevices
,nandnphysicalncabling.

DatanLinknLayern(Layern2)n-nANSWER-Thisnlayernisnresponsiblenfornthenerror-
freendeliverynofndatantonthenreceivingndevicenornnode.nThisnlayernisnimplementednthroughnth
enusenofndevicesnsuchnasnswitchesnandnbridgendevices,nasnwellnasnanythingnwithnannetworkn
interface,nlikenwirelessnornwirednnetworkncards.

NetworknLayern(Layern3)n-nANSWER-
Thisnlayernisnresponsiblenfornthentransmissionnofndatanbetweennhostsninndifferentnnetworksn
asnwellnasnroutingnofndatanpackets.nThisnlayernisnimplementednthroughnthenusenofndevicesns
uchnasnroutersnandnsomenswitches.

,Transportnlayern(layern4)n-nANSWER-
InnthisnlayernprotocolsnensurenthatndatanarentransferrednfromnpointnAntonpointnBnreliablynandn
withoutnerrors.nthisnlayernservicesnincludenflowncontrol,nacknowledgment,nerrorncorrection,n
segmentation,nreassembly,nandnsequencing.

SessionnLayern(Layern5)n-nANSWER-
Thisnlayernisnresponsiblenfornconnectionnestablishment,nsessionnmaintenance,nandnauthen
tication.

PresentationnLayern(Layern6)n-nANSWER-
Thisnlayernisnresponsiblenforntranslatingndatanfromnthenapplicationnlayernintonthenformatnreq
uiredntontransmitnthendatanovernthennetworknasnwellnasnencryptingnthendatanfornsecuritynifnen
cryptionnisnused.

ApplicationnLayern(Layern7)n-nANSWER-
Thisnlayernisnresponsiblenfornnetworknapplicationsn(likenHTTPnornFTP)nandntheirnproductionn
ofndatantonbentransferrednovernthennetwork.

Hubn{PhysicalnLayer}n-nANSWER--
ThensimplestndevicenusednonnannEthernetnnetworknfornconnectingndevicesntoneachnothern

-splitnthenbandwidthnofnanconnectionnamongnallnthencomputersnconnectedntonitn

-
ndonnotnperformnanynpacketnfilteringnornaddressingnfunctionsnbutninsteadnbroadcastndatanton

allncomputersnconnectedntonit

Switchn{DatanandnNetworknLayer}n-nANSWER--
Providesnconnectivityntondevicesninnanlocalnnetworkn

-Createsnandedicatednfull-
speednconnectionnbetweenntwoncomputersnthatnarencommunicatingnwithneachnothern

-nmakesnusenofnthenMACnaddressntondelivernthenmessagentonthenrightndestination

Router{NetworknLayer}n-nANSWER--Interconnectntwonornmorennetworksn

-Operatenatnthenbordernofnyournnetworkn

-
Storesninformationnaboutnthensystemsnthatnarenconnectedntonitnandnwherentonsendnrequests
nwhennthendestinationnisnunknownn




-WorksnatnthennetworknlayernofnthenOSInmodel

, WirelessnAccessnpointn{WAP}n-nANSWER--
Extendsnanwirednnetworkntonwirelessnconnectionsn

-InvolvesnthenIEEEn802.11ngroupnofnstandardsnthatndefinesnwirelessnLAN'sn{WLAN's}

-Centralnconnectingnpointnforncomputersnequippednwithnwirelessnnetworknadaptersn

-nidentifiesneachncomputernbynitsnMACnaddress

PatchnPaneln-nANSWER--
Anboxndesignednasnanjunctionnpointnforntwistednpairn(TP)ncablenandnfiberncablenusedninnnetw
orks.

-Firstnstepninnorganizingnyourncables

Firewalln-nANSWER--
Ansecuritynhardwarenappliancenornsoftwarenapplicationnthatnprotectsnancomputernornnetwor
knfromnunwantednintrusion

-
Blocksnunwantednconnectionsnfromnuntrustednnetworksnandncannblocknbasicnnetworknattac
ks

Modemn{PhysicalnandnDatanlinknLayer}n-nANSWER--
ConnectsnanLANntonanninternetnservicenprovidern

-Convertsndigitalnsignalsnintonanalognsignalsnandnvicenversa

NetworknInterfacenCardn(NIC)n{PhysicalnLayer}n-nANSWER--
TheninterfacenonnancomputernornotherndevicenthatnconnectsntonthenLANn

-
Designedntontakenthencommunicationnoffnthenphysicalncablenornwirelessnsignalnandnpresentn
itntonthencomputernfornprocessingn

-EachnNICnhasnanuniquenphysicalnaddressnknownnasnanMACnaddress

Bridgen{DatanlinknLayer}n-nANSWER-Connectsntwonornmorennetworksn

Forwardsndatantonnextnnetworknwithnanalysisn

Notnwidelynusedninnmodernnnetworks

Repeater{PhysicalnLayer}n-nANSWER-
Amplifiesnthatnsignalnitnreceivesnsonthatnitncanntravelnanlongerndistance