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WGU D315 NETWORK AND SECURITY FOUNDATION, Study notes of Biology

Biology

WGU D315 NETWORK AND SECURITY FOUNDATION

Typology: Study notes

2025/2026

Available from 04/14/2026

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WGU D315 NETWORK AND SECURITY
FOUNDATION
WhichloOSIlolayerloislorelatedlotolotheloIPloprotocollo-loans--✔✔Networklo3
WhichloOSIlolayerloisloorganizinglothelobitslooverlothelophysicallolayerlobetweenlodevicesloinl
othelosamelocollisionlodomain?lo-loans--✔✔DataloLinklo2lo-
loTheyloareloinlothelosameloFrame
WhichloOSIlolayerloisloaloSwitchloat?lo-loans--✔✔DataloLinklo2
WhichloOSIlolayerloisloaloWAPlo(WirelessloAccessloPoint)loat?lo-loans--✔✔DataloLinklo2
WhichloOSIlolayerloisloalorouterloatlo-loans--✔✔Networklo(3)
TCPloprotocolloisloonlowhatloOSIlolayerlo-loans--✔✔Transportlo(4)
OSIlolayerlo1lo-loans--✔✔PhysicalloLayerlo(Cable,loHubs,loRepeaters)
OSIlolayerlo2lo-loans--✔✔DataloLinkloLayerlo(Frame,loSwitch,loPPP,loEthernet)
OSIlolayerlo3lo-loans--✔✔NetworkloLayerlo(Moveslopackets,loIP)
OSIlolayerlo4lo-loans--✔✔TransportloLayerlo(TCP,loendlotoloendloconnection)
OSIloLayerlo5lo-loans--✔✔SessionloLayerlo(API,loSockets,loSynchloandlosendlotoloport)
OSIlolayerlo6lo-loans--
✔✔Presentationlolayerlo(Syntaxloandloencryptionlolayer,loSSL,loSSH,loJPEG)
OSIlolayerlo7lo-loans--✔✔Applicationlolayerlo(endlouserlolayer,lohttp,loapplications)
NetworkloTypologylopointlotolopointlo-loans--✔✔Twolodevicesloconnectlodirectly
NetworkloTypologylobuslo-loans--✔✔Alllodevicesloconnectlotoloalocentrallomainloline
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WGU D315 NETWORK AND SECURITY

FOUNDATION

WhichloOSIlolayerloislorelatedlotolotheloIPloprotocollo-loans--✔✔Networklo 3 WhichloOSIlolayerloisloorganizinglothelobitslooverlothelophysicallolayerlobetweenlodevicesloinl othelosamelocollisionlodomain?lo-loans--✔✔DataloLinklo 2 lo- loTheyloareloinlothelosameloFrame WhichloOSIlolayerloisloaloSwitchloat?lo-loans--✔✔DataloLinklo 2 WhichloOSIlolayerloisloaloWAPlo(WirelessloAccessloPoint)loat?lo-loans--✔✔DataloLinklo 2 WhichloOSIlolayerloisloalorouterloatlo-loans--✔✔Networklo(3) TCPloprotocolloisloonlowhatloOSIlolayerlo-loans--✔✔Transportlo(4) OSIlolayerlo 1 lo-loans--✔✔PhysicalloLayerlo(Cable,loHubs,loRepeaters) OSIlolayerlo 2 lo-loans--✔✔DataloLinkloLayerlo(Frame,loSwitch,loPPP,loEthernet) OSIlolayerlo 3 lo-loans--✔✔NetworkloLayerlo(Moveslopackets,loIP) OSIlolayerlo 4 lo-loans--✔✔TransportloLayerlo(TCP,loendlotoloendloconnection) OSIloLayerlo 5 lo-loans--✔✔SessionloLayerlo(API,loSockets,loSynchloandlosendlotoloport) OSIlolayerlo 6 lo-loans-- ✔✔Presentationlolayerlo(Syntaxloandloencryptionlolayer,loSSL,loSSH,loJPEG) OSIlolayerlo 7 lo-loans--✔✔Applicationlolayerlo(endlouserlolayer,lohttp,loapplications) NetworkloTypologylopointlotolopointlo-loans--✔✔Twolodevicesloconnectlodirectly NetworkloTypologylobuslo-loans--✔✔Alllodevicesloconnectlotoloalocentrallomainloline

NetworkloTypologyloRinglo-loans-- ✔✔Alllodeviceslohavelotwoloconnectionsloandloformloanloendlessloring NetworkloTypologyloStarlo-loans--✔✔Alllodevicesloconnectlotoloalocentrallopoint NetworkloTypologyloTreelo-loans-- ✔✔Multiplelodevicesloconnectlotogetherlo(onloaloswitch)loandlothenlotheloswitchesloarelocon nectedlowithloeachloother NetworkloTypologyloMeshlo-loans--✔✔Alllodevicesloconnectlodirectlylotoloeachloother NetworkloTypologyloHybridlo-loans--✔✔MultipleloNetworkloTypologylowithinlothelonetwork Cloudlo-lowherelodoloIlomanagelotheloOSloIaasloorloPaas?lo-loans--✔✔Iaas WhatlodoloIlomanageloonloPaaslo(2)lo-loans--✔✔ApplicationloandloData Namelothelo 3 loCIAlotriadeslo-loans--✔✔Integrity,loAvailabilityloandloConfidentiality WhatloislotheloCIAloTriadeloIntegrity?lo-loans-- ✔✔Detectsloalterationloinlostorage,lotransitloandloprocess WhatloislotheloCIAloTriadeloAvailability?lo-loans-- ✔✔EnsureloAuthorizedloAccess,loPerformanceloandloBackup Keepinglounauthorizedlouserslooutloislonotloinlothislotriade. WhatloislotheloCIAloTriadeloConfidentiality?lo-loans-- ✔✔Protectlofromlounauthorizedloaccessloandlouse,loprotectinglodataloaccessloinlostorage,lo transitloandloprocess 100mlolongloCatlo 5 locablelosupportslospeedslouplotolo-loans--✔✔ 100 loMb/s 100mlolongloCatlo5elocablelosupportslospeedslouplotolo-loans--✔✔ 1000 loMb/sloorlo 1 loGb/s 100mlolongloCatlo 6 locablelosupportslospeedslouplotolo-loans--✔✔ 10 loGb/s 100mlolongloCatlo6alocablelosupportslospeedslouplotolo-loans--✔✔ 10 loGb/s Doesloalofirewallloprovidelotwolowayloprotection?lo-loans-- ✔✔Yes,loitloprotectsloingressloandloegresslodata Firewalllothatloonlylocheckslotheloaddresslolabello-loans--✔✔PacketloFilter

elosystem.loIflonowloalorequestlocomeslotolotheloattackedloserver,lotheloattackerlocanlotunnell ointolotheloclientloandlosincelodnsloconnectionsloarelorarelylomonitored,lotheloattackerlostaysl ohidden. CyberloAttacklo-loXXSloattacklo-loans-- ✔✔CrossloSiteloScriptinglousesloalowebloformlotoloinjectlomaliciouslocode. CyberloAttacklo-loSocialloengineeringlo-loans-- ✔✔Convincelosomeonelotologiveloaloyouloaccesslotolosensitiveloinformation CyberloAttacklo-loDoSloandloDDoslo-loans-- ✔✔DenialloofloServiceloattackslofloodloaloserverlowithlotoolomuchlotraffic CyberloAttacklo-loSQLloInjectionlo-loans-- ✔✔Alotechniquelotoloaddloalostringlooflosqllocodelotoloaloquerylotologainloaccesslotolothelotarg etedlodatabase CyberloAttacklo-loARPloPoisoninglo/loARPloSpoofinglo-loans-- ✔✔LANloattacklothatlosendslomaliciousloAddressloResolutionloProtocollopacketslotoloalodef aultlogatewayloinloorderlotolochangelotheloIPlotoloMAClopairings CyberloAttacklo-loPhishinglo-loans--✔✔Maliciouslolinklothatlooftenlospoofsloalovalidlosite CyberloAttacklo-loMalwarelo-loans-- ✔✔Softwarelothatloislodesignedlotolodisrupt,lostealloandloopenlobackdoors. Viruslo-loans-- ✔✔Softwarelothatlocanloreplicateloitself.loCan'tlobelocontrolledloremotely.loMainlogoalloislotol omodifyloinformation Wormlo-loans-- ✔✔Softwarelothatlocanloreplicateloitselfloandlocanlobelocontrolledloremotely.loMainlogoalloisl otoloeatlosystemloresources TrojanloHorselo-loans-- ✔✔Maliciouslosoftwareloinsidelodesirablelosoftware.loCanlonotloreplicatelobutlocanlobelocon trolledloremotely.loMainlogoalloislotolostealloinformation WhatloisloAESlo 256 lo-loans-- ✔✔AdvancedloEncryptionloStandardlowithloalosymmetriclokeylousedloinlomostloenterpriselo applicationslo(i.e.lobanking).loFastestloencryptionlomethod WhatloisloSSLlo-loans-- ✔✔SecureloSocketsloLayerloencryptionlowithloanloasymmetriclokey.loFormerlylousedloinloht tps,lobutlonowloreplacedlobyloTSL

WhatloisloTSLlo-loans-- ✔✔Transportlolayerlosecurity,loanloasymmetriclokeylothatloreplacedloSSL.lousedloinlohttps WhatloisloIPseclo-loans-- ✔✔InternetloProtocolloSecuritylousedlotoloencryptlodataloinloflightlowithloanloasymmetricloke ylocommonlylousedloinloVPN's Whereloarelopubliclokeyslousedlo-loans-- ✔✔Asymmetricloencryptionlouseslopublicloandloprivatelokeys PrivateloCloudlo-loans-- ✔✔SingleloTenantlouse.loOftenloinloonelodatalocenterloandlotheloownerloholdslothelorespons ibility PublicloCloudlo-loans-- ✔✔AWSloorloMSloAzurelothatloofferlomultiplelosolutions.loDataloownerlooftenlodoeslonotlokn owlowherelothelodataloislostoredlo(building,lorack,lodisk) HybridloCloudlo-loans--✔✔Mixlooflodifferentloclouds Communitylocloudlo-loans-- ✔✔Alocloudlothatloisloopenloonlylotolospecificloorganizationslothatlohavelocommonloconcern s. WhatloislothelohighestloWLANlosecurityloprotocollocommonlylousedlo-loans-- ✔✔WAP2loencryptedlowithloAESlo(WAP3lowasloreleasedloinlo 2018 lobutlonotloyetlowidelyloa dapted). WhatloislotheloriskloonlounsecuredlopublicloWLANlo-loans-- ✔✔FakeloAccess.loAnloattackerlowantsloyoulotoloconnectlotolotheirloWLANlotologainloaccess lotolothelosentloandloreceivedlodata.loAlwayslouseloaloVPNloonlounsecuredlonetworks Whatloarelothelo 3 loAAAlostandloforlo-loans-- ✔✔Authentication,loAuthorizationloandloAccounting AAAlo-loAuthenticationlo-loans-- ✔✔Processloofloconfirmingloalousersloidentity.loi.e.loActiveloDirectory,loMFA AAAlo-loAuthorizationlo-loans-- ✔✔OncelotheloAuthenticationloprocessloislocompleted,lotheloAuthorizationlodetermineslow hatloresourceslothelouserlocanloaccess