单项选择题 HowisthecostofavirtuallinkinOSFPcalculated？（）

单项选择题 InJUNOSsoftware，whichtypeofqueueprioritycanleadtostarvationinotherqueues？（）

单项选择题 WhichactionoccurswhentheBGProute20.1.0.0/16isevaluatedbythepolicyexpression？（）[editpolicy-options]policy-statementreject_10{from{route-filter20.1.0.0/16orlongerM}then{communityadd90-1；accept}}policy-statementaccept_20{from{route-filter20.1.0.0/16orlongerM}then{communityadd100-1；reject；}}community100-1members100：1；community90-1members90：1[editprotocols]bgp{groupebgp-group{neighbor172.16.201.1{export（reject-10&&accept-20）；}}}A.Therouteisnotannounced.B.Therouteisannouncedwith90：1added.C.Therouteisannouncedwith100：1added.D.Therouteisannouncedwithcommunities90：1and100：1added.

单项选择题 Youhaveafirewallfiltercontainingtwotermsappliedinaninbounddirectiononacustomerinterface.Youwouldlikethisfiltertoprotectyournetworkfromaspoofeddenialofserviceattack.Whatmatchcriterionshouldbeusedinthefirsttermofthefilter？（）A.SourceTCPportB.SourceIPaddressC.DestinationTCPportD.DestinationIPaddress

未知题型 DPI对业务的标识依据什么实现（）

单项选择题 InIS－IS，howdoestherestartingrouterinformitshelpersthatarestartseventoccurred？（）

单项选择题 YouhaveaLevel1－onlyrouter（RouterA）inIS－ISarea49.0001.HowdoesRouterAlearnhowtogettoIPprefixedinotherareas？（）

单项选择题 WhichcommandclearsthehistoryBGPdampedroutes？（）

单项选择题 WhatsettinginJUNOSsoftwareforcesabgpspeakertowaitforabgpneighbortoinitiateabgpsession？（）

单项选择题 WhatistheDraft－Kompellacontrolplanebasedon？（）

单项选择题 InwhatPIMtopologywouldyouuseMSDPwithinasingledomain？（）

单项选择题 WhatpreventsroutingloopswhenMSDPisconfiguredacrossmultipledomains？（）

单项选择题 InJUNOSsoftware，whatisrequiredtoredistributeRIProutesintoOSPF？（）

单项选择题 AnOSPFnon-backboneareaallowsexternalroutestobefloodedwithinthearea.Theseexternalroutesarepropagatedintootherareas.However，externalroutesfromotherareasarenotallowedtoenterthisarea.WhichtypeofSPFareadoesthisdescribe？（）A.stubareaB.transitareaC.borderareaD.not-so-stubbyarea

单项选择题 WhichJUNOSsoftwareoperational－modecommanddisplaysthestatusofaDraft－MartiniVPN？（）

单项选择题 AnIS－ISrouterisadjacenttoandpassingtrafficwithaneighbor.Youperformashowis interfacedetailcommandandnoticethatforsomeinterfacesyouhaveacircuittypeof3.WhichIS－ISlevel（s）isenabledontheseinterfaces？（）

单项选择题 WhichactionoccurswhentheBGProute20.1.0.0/16isevaluatedbythepolicyexpression？（）[editpolicy-options]policy-statementmy-filter{term-first{from{route-filter192.168.0.0/16orlongeraccept；route-filter192.168.1.0/24exactaccept；route-filter192.168.2.0/24exact；}then{metric10；accept；}termsecond{then{metric20；accept；}}policy-statementmain{termchange-attributesfrom{policymy-filter；}thenaccept；}termdefault{thenreject；}}[editprotocols]bgp{exportmain；}A.TherouteisnotadvertisedintoBGPB.TherouteisadvertisedintoBGPwithmetric10.C.TherouteisadvertisedintoBGPwithmetric20.D.TherouteisadvertisedintoBGPwithdefaultmetric.

单项选择题 GiventhetwoASpathregularexpressions："65000＋（65001|65002）""65000＋（65001|65002）{0，}"WhichASpathmatchesbothexpressions？（）

单项选择题 WhichisastepintheJUNOSsoftwareCSPFalgorithm？（）

单项选择题 InJUNOSsoftware，whichistheonlyBGPattributewhereahighervalueispreferred？（）