单项选择题

SelectakeybenefitofDSL.（）

A.TCPpacketsizescanbeoptimizedbytheroutersothereisnoIPSecorAAL5padding.
B.ThelocalloopisadedicatedconnectionforasinglesubscribertotheDSLAM.
C.AccesstotheWANmediausesapoll/responsemechanismsonotwosubscriberstransmitatthesametime.
D.TherearenodistancerequirementsfromtheCentralOffice(CO).

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热门试题

单项选择题All－in－oneUTMsecuritygatewaysarestartingtodisplaceroutersinmanysmallbusinessnetworks.WhatdoesUTMstandfor？（）

A.UnitedThreatMonitor
B.UniversalThreatManager
C.UnifiedThreatManagement
D.UltimateThreatMonitoring

单项选择题WhichprotocoldoestheUCSFabricInterconnectsupportonportchanneluplinks?（）

A.LACP
B.PAgP
C.MCPC

单项选择题WhichstatementistruewhenICMPechoandecho－replyaredisabledonedgedevices？（）

A.Pingsareallowedonlytospecificdevices.
B.CDPinformationisnotexchanged.
C.Portscanscannolongerberun.
D.Somenetworkdiagnosticdataislost.
E.Wirelessdevicesneedtobephysicallyconnectedtotheedgedevice.
F.OSPFroutingneedsthecommandipospfnetworknon-broadcastenabled.

单项选择题WhichstatementcorrectlydescribesenablingBPDUguardonanaccessportthatisalsoenabledforPortFast？（）

A.Uponstartup，theporttransmits10BPDUs.IftheportreceivesaBPDU，PortFastandBPDUguardaredisabledonthatportanditassumesnormalSTPoperation.
B.TheaccessportignoresanyreceivedBPDU.
C.IftheportreceivesaBPDU，itisplacedintotheerror-disablestate.
D.BPDUguardisonlyconfiguredgloballyandtheBPDUfilterisrequiredforport-levelconfiguration.

单项选择题Inyourdatabase，youdiscoveredthatatempfileinalocallymanagedtemporarytablespacehasbeendeletedattheoperatingsystemlevel.Howwouldyourecoverthetablespace？（）

A.flashbackthedatabase
B.performpoint-in-timerecovery
C.performafulldatabaserecovery
D.dropandre-createthetablespace
E.useRecoveryManager（RMAN）torecoverthedatabase