RoutersAandBhaveanOC12candaGElinkbetweenthemandarerunningOSPFoverbothoftheselinks.Whichitemiscorrect，assumingthedefaultJUNOSsoftwareOSPFmetriccalculation？（）

单项选择题WhichchoicedescribestheJUNOSsoftwaredefaultpolicyactionforBGProutes？（）

单项选择题Whichactionoccurswhenthepolicymain-policyevaluatestheBGProute10.0.55.2 32？（）[editpolicy-options]policy-statementtest{from{route-filter10.0.0.016 orlongeraccept；route-filter10.0.67.0 24orlangerreject；route-filter10.0.0.0 8orlanger；}then{metric10；communityaddno-advertise；accept；}}policy-statementmain-policy{termonly-want-certain-routes{from{policytest；}then{communityaddharry-402；accept；}}}communitynoadvertisemembersno-advertise；communityharry-402members666：402；[editprotocols]bgp{exportmain-policy；}

单项选择题Basedontheconfigurationshownintheexhibit，whatwillhappentothetrafficmatchingthesecuritypolicy？（）[editschedulers]user@hostshowschedulernow{mondayall-day；tuesdayexclude；wednesday{start-time07：00：00stop-time18：00：00；}thursday{start-time07：00：00stop-time18：00：00；}}[editsecuritypoliciesfrom-zonePrivateto-zoneExternal]user@hostshowpolicyallowTransit{match{source-addressPrivateHosts；destination-addressExtServers；applicationExtApps；}then{permit{tunnel{ipsec-vpnmyTunnel；}}}scheduler-namenow；}A.ThetrafficispermittedthroughthemyTunnelIPsectunnelonlyonTuesdays.B.ThetrafficispermittedthroughthemyTunnelIPsectunneldaily，withtheexceptionofMondays.C.ThetrafficispermittedthroughthemyTunnelIPsectunnelalldayonMondaysandWednesdays between7：00amand6：00pm，andThursdaysbetween7：00amand6：00pm.D.ThetrafficispermittedthroughthemyTunnelIPsectunnelalldayonMondaysandWednesdays between6：01pmand6：59am，andThursdaysbetween6：01pmand6：59am

单项选择题AdefectiveCD－ROMdriveisreplacedwithanewCD－ROMdrive.ThenewCD－ROMdriveisabletoreadanyCDthatitaccesses，butmusicCDsdonotplaymusic.WhatistheMOSTlikelycauseofthisproblem？（）

单项选择题AcustomerreceivesaCD-RWdiskfromacomputervendor.Thecustomertriestoreadthediskinacomputerwitha4XCD-ROMdriveandisunabletoreadanyinformation.ThecustomertriestheCD-RWdiskona32XCD-ROMdriveanditreadscorrectly.Whatisthecauseofthisproblem？（）A.The4XCD-ROMdrivehasdirtyopticsorlaserandrequirescleaning.B.The4XCD-ROMdriveneedstobejumperedtosupportCD-RWdisks.C.The4XCD-ROMdrivedoesnotsupportthemulti-readspecification.D.The4XCD-ROMisfine，buttheCD-RWdiskhasaflawinitsformat.

单项选择题Inwhichsituation（s）willWindowsXPadvisethetechnicianinstallingadevicethatthedriverissignedornot？（）

单项选择题沃云WLinux操作系统默认安装方式( )

单项选择题关于NTP和linux系统时间的说法错误的是( )

单项选择题不可查看文件内容的是：

单项选择题历史数据，趋势数据的保留期设置相对合理的是: