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Exam:HPE6-A85
Title:
ArubaCertifiedCampus
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1.Whatisthecorrectcommandtoaddastaticroutetoaclass-c-network10.2.10.0viaagatewayof 1721611?
A.ip-route10.2.10.0/24172.16.1.1
Biproute10210025525525501721611descriptionaruba
Ciproute102100/241721611
Diproute-static10210025525525501721611
Answer:A
Explanation:
Thecorrectcommandtoaddastaticroutetoaclass-c-network102100viaagatewayof1721611is ip-route102100/241721611Thiscommandspecifiesthedestinationnetworkaddress(102100) andprefixlength(/24)andthenext-hopaddress(1721611)forreachingthatnetworkfromtheswitch Theothercommandsareeitherincorrectsyntaxorincorrectparametersforaddingastaticroute.
References:
https://www.arubanetworks.com/techdocs/AOS-CX1004/NOSCG/Content/cx-noscg/ip-routing/sta
2.Whenwouldyoubondmultiple20MHzwide802.11channels?
ATodecreasetheSignaltoNoiseRatio(SNR)
B.ToincreasethroughputbetweentheclientandAP
CToprovisionhighlyavailableAPgroups
DToutilizehighgainomni-directionalantennas
Answer:B
Explanation:
Bondingmultiple20MHzwide80211channelsisatechniquetocreateawiderbandwidthchannelthat supportshigherdataratetransmissionsItcanincreasethethroughputbetweentheclientandAPby usingmorespectrumresourcesandreducinginterference
References:https://ieeexploreieeeorg/document/9288995
3WhatisindicatedbyasolidamberradiostatusLEDonanArubaAP?
A.NotenoughPoEisprovidedfromtheswitchtopowerbothradiosoftheAP
BTheradioisworkinginmeshmode
C.Theradioisworkingthe5GHzbandonly.
DTheradioisenabledinmonitororspectrumanalysismode
Answer:D
Explanation:
ThesolidamberradiostatusLEDonanArubaAPAccessPoint(AP)AccessPoint(AP)isadevicethat connectswirelessdevicestoawirednetworkusingWi-FiorotherwirelessstandardsAPsactas transmittersandreceiversofwirelesssignalsandprovidewirelesscoverageforaspecificareaAPscan operateindifferentmodessuchasroot,repeater,bridge,mesh,etcAPscanalsosupportdifferent featuressuchassecurity,QoS,roaming,loadbalancing,etcAPscanbestandalonedevicesormanaged bycontrollersorcloudservicesAPscanbeverifiedbyusingcommandssuchasshowapactive,show apdatabase,showapbss-table,etcindicatesthattheradioisenabledinmonitororspectrumanalysis modeMonitormodeisamodethatallowstheAPtoscanallchannelsandcollectinformationabout wirelesstraffic,interference,roguedevices,etcSpectrumanalysismodeisamodethatallowstheAPto scanallchannelsandcollectinformationaboutRFRadioFrequency(RF)RadioFrequency(RF)isaterm
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thatreferstoelectromagneticwavesthathavefrequenciesbetween3kHzand300GHz.RFwavesare usedforvariouspurposessuchascommunication,broadcasting,radar,navigation,remotecontrol,etc RFwavescanbemodulatedbychangingtheiramplitude,frequency,orphasetoencodeinformation.RF wavescanalsobeaffectedbyvariousfactorssuchasattenuation,reflection,refraction,diffraction, scattering,interference,noise,etcRFwavescanbemeasuredbyusingdevicessuchasspectrum analyzers,powermeters,antennas,etcenvironment,noisesources,channelutilization,etcBothmodes areusefulfortroubleshootingandoptimizingwirelessperformance,buttheydisablenormaldata transmissionandreceptionontheradio
TheotheroptionsarenotindicatedbyasolidamberradiostatusLEDonanArubaAPbecause:
-NotenoughPoEisprovidedfromtheswitchtopowerbothradiosoftheAP:Thisoptionisfalsebecause notenoughPoEPoweroverEthernet(PoE)PoweroverEthernet(PoE)isatechnologythatallows networkdevicestoreceivepoweranddataoverthesameEthernetcable.PoEeliminatestheneedfor separatepowersourcesandcablesfordevicessuchasIPphones,cameras,accesspoints,etcPoEis definedinIEEE802.3afandIEEE802.3atstandardsandsupportsdifferentpowerclassesandmodes.
PoEcanbeprovidedbyswitchesorinjectorsthatactaspowersourcingequipment(PSE)andreceived bydevicesthatactaspowereddevices(PD).PoEcanbeverifiedbyusingcommandssuchasshow powerinline,showpower-over-ethernet,debugipdevicetracking,etcisindicatedbyablinkingamber powerstatusLEDonanArubaAP,notbyasolidamberradiostatusLED.Ablinkingamberpowerstatus LEDmeansthattheAPisreceivinginsufficientpowerfromtheswitchorinjectorandcannotoperate normallyAsolidgreenpowerstatusLEDmeansthattheAPisreceivingsufficientpowerfromtheswitch orinjectorandcanoperatenormally
-Theradioisworkinginmeshmode:Thisoptionisfalsebecausetheradioworkinginmeshmodeis indicatedbyasolidgreenradiostatusLEDonanArubaAP,notbyasolidamberradiostatusLEDAsolid greenradiostatusLEDmeansthattheradioisworkinginnormalmodeormeshmodeandcantransmit orreceivedataontheassignedchannelMeshmodeisamodethatallowstheAPtoconnectwirelessly tootherAPsandformameshnetworkwithoutrequiringwiredconnections
-Theradioisworkingthe5GHzbandonly:Thisoptionisfalsebecausetheradioworkinginthe5GHz bandonlyisindicatedbyasolidblueradiostatusLEDonanArubaAP,notbyasolidamberradiostatus LED.AsolidblueradiostatusLEDmeansthattheradioisworkingindual-bandmodeandcantransmitor receivedataonboth24GHzand5GHzbands
References:
https://wwwarubanetworkscom/techdocs/Instant86WebHelp/Content/instant-ug/ap-led-behaviorhtm https://www.arubanetworks.com/techdocs/Instant86WebHelp/Content/instant-ug/troubleshooting/ap-m onitor-https://wwwarubanetworkscom/techdocs/Instant86WebHelp/Content/instant-ug/troubleshooting /ap-spectrum
4WhatdoesWPA3-PersonaluseasthesourcetogenerateadifferentPairwiseMasterKey(PMK)each timeastationconnectstothewirelessnetwork?
ASession-specificinformation(MACsandnonces) BOpportunisticWirelessEncryption(OWE)
CSimultaneousAuthenticationofEquals(SAE)
DKeyEncryptionKey(KEK)
Answer:A
Explanation:
ThesourcethatWPA3-PersonalusestogenerateadifferentPairwiseMasterKey(PMK)eachtimea stationconnectstothewirelessnetworkissession-specificinformation(MACsandnonces)
WPA3-PersonalusesSimultaneousAuthenticationofEquals(SAE)toreplacePSKauthenticationin WPA2-PersonalSAEisasecurekeyestablishmentprotocolthatusesaDiffie-Hellmankeyexchangeto deriveasharedsecretbetweentwopartieswithoutrevealingittoaneavesdropper
SAEinvolvesthefollowingsteps:
-ThestationandtheaccesspointexchangeCommitmessagesthatcontaintheirMACaddressesand randomnumberscallednonces
-ThestationandtheaccesspointusetheirownpasswordsandthereceivedMACaddressesand noncestocalculateasharedsecretcalledSAEPasswordElement(PE)
-ThestationandtheaccesspointusetheirownPEandthereceivedMACaddressesandnoncesto calculateasharedsecretcalledSAEKeySeed(KS).
-ThestationandtheaccesspointusetheirownKSandthereceivedMACaddressesandnoncesto calculateasharedsecretcalledSAEKeyConfirmationKey(KCK).
-ThestationandtheaccesspointusetheirownKCKandthereceivedMACaddressesandnoncesto calculateaconfirmationvaluecalledSAEConfirm.
-ThestationandtheaccesspointexchangeConfirmmessagesthatcontaintheirSAEConfirmvalues -.ThestationandtheaccesspointverifythatthereceivedSAEConfirmvaluesmatchtheirown calculatedvaluesIftheymatch,theauthenticationissuccessfulandthestationandtheaccesspoint haveestablishedasharedsecretcalledSAEPMK
TheSAEPMKisdifferentforeachsessionbecauseitdependsontheMACaddressesandnoncesthat areexchangedineachauthenticationprocessTheSAEPMKisusedasaninputforthe4-way handshakethatgeneratesthePairwiseTemporalKey(PTK)forencryptingdataframes
TheotheroptionsarenotsourcesthatWPA3-PersonalusestogenerateadifferentPMKeachtimea stationconnectstothewirelessnetworkbecause:
-OpportunisticWirelessEncryption(OWE):OWEisafeaturethatprovidesencryptionforopennetworks withoutrequiringauthenticationorpasswordsOWEusesasimilarkeyestablishmentprotocolasSAE, butitdoesnotgenerateaPMKInstead,itgeneratesaPairwiseSecret(PS)thatisusedasaninputfor the4-wayhandshakethatgeneratesthePTK.
-SimultaneousAuthenticationofEquals(SAE):SAEisnotasource,butaprotocolthatuses session-specificinformationasasourcetogenerateadifferentPMKeachtimeastationconnectstothe wirelessnetwork
-KeyEncryptionKey(KEK):KEKisnotasource,butanoutputofthe4-wayhandshakethatgenerates thePTKKEKisusedtoencryptgroupkeysthataredistributedbytheaccesspoint
References:
https://wwwwi-fiorg/discover-wi-fi/wi-fi-certified-6e
https://wwwwi-fiorg/file/wi-fi-alliance-unlicensed-spectrum-in-the-us
https://wwwciscocom/c/en/us/products/collateral/wireless/catalyst-9100ax-access-points/wpa3-dep-guid e-oght
https://infosupporthuaweicom/info-finder/encyclopedia/en/WPA3html
https://rpos3nl/2019-2020/p99/presentationpdf
5WhichflewinaLayer3IPv4packetheaderisusedtomitigateLayer3routeloops?
AChecksum
B.TimeToLive
CProtocol
D.DestinationIP
Answer:B
Explanation:
ThefieldinaLayer3IPv4packetheaderthatisusedtomitigateLayer3routeloopsisTimeToLive(TTL) TTLisan8-bitfieldthatindicatesthemaximumnumberofhopsthatapacketcantraversebeforebeing discardedTTLissetbythesourcedeviceanddecrementedbyonebyeachrouterthatforwardsthe packetIfTTLreacheszero,thepacketisdroppedandanICMPInternetControlMessageProtocol (ICMP)InternetControlMessageProtocol(ICMP)isanetworkprotocolthatprovideserrorreportingand diagnosticfunctionsforIPnetworksICMPisusedtosendmessagessuchasechorequestsandreplies (ping),destinationunreachable,timeexceeded,parameterproblem,sourcequench,redirect,etc.ICMP messagesareencapsulatedinIPdatagramsandhaveaspecificformatthatcontainsfieldssuchastype, code,checksum,identifier,sequencenumber,data,etc.ICMPmessagescanbeverifiedbyusing commandssuchasping,
traceroute,debugipicmp,etc.messageissentbacktothesourcedevice.TTLisusedtomitigateLayer3 routeloopsbecauseitpreventspacketsfromcirculatingindefinitelyinaloopednetworktopologyTTL alsohelpstoconservenetworkresourcesandavoidcongestioncausedbyloopedpackets.
TheotheroptionsarenotfieldsinaLayer3IPv4packetheaderbecause:
-Checksum:Checksumisa16-bitfieldthatisusedtoverifytheintegrityoftheIPheaderChecksumis calculatedbythesourcedeviceandverifiedbythedestinationdevicebasedonthevaluesofallfieldsin theIPheaderChecksumdoesnotmitigateLayer3routeloopsbecauseitdoesnotlimitthenumberof hopsthatapacketcantraverse
-Protocol:Protocolisan8-bitfieldthatindicatesthetypeofpayloadcarriedbytheIPdatagramProtocol identifiestheupper-layerprotocolthatusesIPfordatatransmission,suchasTCPTransmissionControl Protocol(TCP)TransmissionControlProtocol(TCP)isaconnection-orientedtransportlayerprotocolthat providesreliable,ordered,anderror-checkeddeliveryofdatabetweenapplicationsondifferentdevices TCPusesathree-wayhandshaketoestablishaconnectionbetweentwoendpoints,andusessequence numbers,acknowledgments,andwindowingtoensuredatadeliveryandflowcontrol.TCPalsouses mechanismssuchasretransmission,congestionavoidance,andfastrecoverytohandlepacketlossand congestion.TCPsegmentsdataintosmallerunitscalledsegments,whichareencapsulatedinIP datagramsandhaveaspecificformatthatcontainsfieldssuchassourceport,destinationport,sequence number,acknowledgmentnumber,headerlength,flags,windowsize,checksum,urgentpointer,options, data,etcTCPsegmentscanbeverifiedbyusingcommandssuchastelnet,ftp,ssh,debugiptcp transactions,etc.,UDPUserDatagramProtocol(UDP)UserDatagramProtocol(UDP)isa connectionlesstransportlayerprotocolthatprovides
6AnetworkadministratorwithexistingIAP-315accesspointsisinterestedinArubaCentralandneedsto knowwhichlicenseisrequiredforspecificfeaturesPleasematchtherequiredlicenseperfeature (Matchesmaybeusedmorethanonce)
Answer:
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Explanation:
a)Alertsonconfigchangesviaemail-Foundation
b)Group-basedfirmwarecompliance-Foundation
c)HeatmapsofdeployedAPs-Advanced
d)LiveupgradesofanAOS10cluster-Advanced
AccordingtotheArubaCentralLicensingGuide1,theFoundationLicenseprovidesbasicdevice managementfeaturessuchasconfiguration,monitoring,alerts,reports,firmwaremanagement,etcThe AdvancedLicenseprovidesadditionalfeaturessuchasAIinsights,WLANservices,NetConductorFabric, heatmaps,liveupgrades,etc
https://www.arubanetworks.com/techdocs/central/2.5.3/content/pdfs/licensing-guide.pdf
7AnetworktechnicianistroubleshootingonenewAPatabranchofficethatwillnotreceiveIts configurationfromArubaCentralTheotherAPsatthebranchareworkingasexpectedTheoutputofthe 'showapdebugcloud-servercommand'showsthatthe"cloudconflgreceived"IsFALSE
AfterconfirmingthenewAPhasinternetaccess,whatwouldyouchecknext?
ADisableandenableactivatetotriggerprovisioningrefresh
BVerifytheAPcanpingthedeviceonarubanetworkscom
CVerifytheAPhasalicenseassigned
DDisableandenableArubaCentraltotriggerconfigurationrefresh
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Answer:C
Explanation:
IftheAPhasinternetaccessbutdoesnotreceiveitsconfigurationfromArubaCentral,onepossible reasonisthattheAPdoesnothavealicenseassignedinArubaCentralAlicenseisrequiredforeachAP tobemanagedbyArubaCentral
References:
https://wwwarubanetworkscom/techdocs/Central/252-GA/HTMLframesethtm#GUID-8F0E7E8
8AnetworktechnicianisusingArubaCentraltotroubleshootnetworkissues
Whichdashboardcanbeusedtoviewandacknowledgeissueswhenbeginningthetroubleshooting process?
A.theAlertsandEventsdashboard
BtheAuditTraildashboard
C.theReportsdashboard
DtheToolsdashboard
Answer:A
Explanation:
TheAlertsandEventsdashboarddisplaysalltypesofalertsandeventsgeneratedforeventspertaining todeviceprovisioning,configuration,andusermanagementYoucanusetheConfigicontoconfigure alertsandnotificationsfordifferentalertcategoriesandseverities1Youcanalsoviewthealertsand eventsintheListviewandSummaryview2
References:
1https://wwwarubanetworkscom/techdocs/central/latest/content/nms/alerts/configuring-alertshtm
2https://wwwarubanetworkscom/techdocs/central/latest/content/nms/alerts/viewing-alertshtm
9YouneedtoconfigurewirelessaccessforseveralclassesofloTdevices,someofwhichoperateonly with80211bEachclassmusthaveauniquePSKandwillrequireadifferentsecuritypolicyappliedasa roleTherewillbe15-20differentclassesofdevicesandperformanceshouldbeoptimized
Whichoptionfulfillstheserequirements?
ASingleSSIDwithMPSKforeachloTclassusing5GHzand6GHzbands
B.SingleSSIDwithMPSKforeachloTclassusing2.4GHzand5GHzbands
CIndividualSSIDswithuniquePSKforeachloTclass,using5GHzand6GHzbands
D.IndividualSSIDswithuniquePSKforeachloTclass,using2.4GHZand5GHzband
Answer:D
Explanation:
TheoptionthatfulfillstherequirementsistocreateindividualSSIDswithuniquePSKforeachloTclass, using24GHzand5GHzband
Thisoptionprovidesthefollowingbenefits:
-EachloTclasshasauniquePSKthatcanbeusedtoapplyadifferentsecuritypolicyasaroleThis enhancesthesecurityandflexibilityoftheWLANnetwork
-IndividualSSIDsallowforbetterisolationandmanagementofdifferentloTclassesThisimprovesthe performanceandscalabilityoftheWLANnetwork
-Usingboth24GHzand5GHzbandsallowsforbackwardcompatibilitywithloTdevicesthatoperate onlywith80211b,whichusesthe24GHzband1Italsoallowsforhigherthroughputandless
interferenceforloTdevicesthatsupport802.11a,802.11g,802.11n,or802.11ac,whichusethe5GHz band2
Theotheroptionsdonotfulfilltherequirementsbecause:
-SingleSSIDwithMPSKforeachloTclassusing5GHzand6GHzbands:Thisoptiondoesnotsupport loTdevicesthatoperateonlywith80211b,whichusesthe24GHzband1Italsodoesnotoptimizethe performanceoftheWLANnetwork,asasingleSSIDmaycauseco-channelinterferenceandcongestion amongdifferentloTclasses
-SingleSSIDwithMPSKforeachloTclassusing24GHzand5GHzbands:Thisoptiondoesnot optimizetheperformanceoftheWLANnetwork,asasingleSSIDmaycauseco-channelinterferenceand congestionamongdifferentloTclasses
-IndividualSSIDswithuniquePSKforeachloTclass,using5GHzand6GHzbands:Thisoptiondoes notsupportloTdevicesthatoperateonlywith802.11b,whichusesthe2.4GHzband1.
References:
1https://en.wikipedia.org/wiki/IEEE802.11b-1999
2https://wwwlifewirecom/wireless-standards-802-11a-802-11b-g-n-and-802-11ac-816553
10Whichcommandsareusedtosetadefaultrouteto10451onanArubaCXswitchwhenln-band managementusinganSVlisbeingused?
AiPdefault-gateway10451
Biproute00007010451vrfmgmt
Ciproute0000/010451
Ddefault-gateway10451
Answer:C
Explanation:
Thecommandthatisusedtosetadefaultrouteto10451onanArubaCXswitchwhenin-band managementusinganSVIisbeingusedisiproute0000/010451Thiscommandspecifiesthe destinationnetworkaddress(0000)andprefixlength(/0)andthenext-hopaddress(10451)for reachinganynetworkthatisnotdirectlyconnectedtotheswitchThedefaultrouteappliestothedefault VRFVirtualRoutingandForwarding.VRFisatechnologythatallowsmultipleinstancesofaroutingtable toco-existwithinthesamerouteratthesametimeVRFsaretypicallyusedtosegmentnetworktrafficfor security,privacy,oradministrativepurposes.,whichisusedforin-bandmanagementtrafficthatgoes throughanSVISwitchVirtualInterfaceSVIisavirtualinterfaceonaswitchthatallowstheswitchtoroute packetsbetweendifferentVLANsonthesameswitchordifferentswitchesthatareconnectedbyatrunk linkAnSVIisassociatedwithaVLANandhasanIPaddressandsubnetmaskassignedtoit12
References:
1
https://wwwarubanetworkscom/techdocs/AOS-CX/1008/HTML/iproute4100i-6000-6100-6200/Conte nt/Ch 2
https://wwwarubanetworkscom/techdocs/AOS-CX/1008/HTML/iproute4100i-6000-6100-6200/Conte nt/Ch
11WhichProtocolDataUnit(PDU)representsthedatalinklayerPDU?
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B.PDU2-Frame
CPDU3-Packet
D.PDU4-Segment
Answer:B
Explanation:
AframeisthedatalinklayerPDUthatencapsulatesthenetworklayerPDU(packet)withaheaderanda trailerthatcontaininformationsuchassourceanddestinationMACaddresses,frametype,error detection,etcAframeistransmittedoveraphysicalmediumsuchasEthernet,Wi-Fi,etc
References:
https://wwwarubanetworkscom/techdocs/ArubaOS86WebHelp/Content/arubaos-solutions/1-ov
12.WhenusingArubaCentralwhatcanidentifyrecommendedstepstoresolvenetworkhealthissuesand allowsyoutosharedetailedinformationwithsupportpersonnel?
A.OverviewDashboard
BOAlOps
C.AlertsandEvents
DAuditTrail
Answer:B
Explanation:
OAlOpsisafeatureofArubaCentralthatusesartificialintelligenceandmachinelearningtoidentify recommendedstepstoresolvenetworkhealthissuesandallowsyoutosharedetailedinformationwith supportpersonnelOAlOpsprovidesinsightsintonetworkperformance,rootcauseanalysis,anomaly detection,proactivealerts,andautomatedremediationactionsOAlOpsalsointegrateswithArubaUser ExperienceInsight(UXI)sensorstomeasureandimproveuserexperienceacrosswiredandwireless networks
References:https://wwwarubanetworkscom/assets/ds/DSArubaCentralpdf
13YouneedtotroubleshootanArubaCX62004-nodeVSFstackswitchthatfailstobootcorrectlySelect theoptionthatallowsyoutoaccesstheswitchandseethebootoptionsavailableforOSimagesand ServiceOS
A.Member2RJ-45consoleport
BMember2switchmgmtport
C.ConductorUSB-Cconsoleport
DConductormgmtportusingSSH
Answer:C