多个相邻的毛囊及具所属皮脂腺或汗腺的急性化脓性感染A．B．C．D．E．

A.Layer3routingbetweentheAccessandAggregationlayersfacilitiestheabilitytospanVLANsacrossmultipleaccessswitches，whichisarequirementformanyservervirtualizationandclusteringtechnologies.

B.“East-west”server-to-servertrafficcantravelbetweenaggregationmodulesbywayofthecore，butbackupandreplicationtraffictypicallyremainswithinanaggregationmodule.

C.Loadbalancing，firewallservice，andothernetworkservicearecommonlyintegratedbytheuseofservicemodulesthatareinsertedintheaggregationswitched.

D.VirtualizationtoolsallowacosteffectiveapproachforredundancyinthenetworkdesignbyusingtwoorfourVDCsfromthesamephysicalswitch.

WhendesigningtheNetworkAdmissionControl（NAC）AppliancefortheEnterpriseCampus Network，whichofthefollowingrequirementswouldhelpthedesignertonarrowdowntheNAC choices，fromVirtualGatewaytoRealIPGateway，orfromIn-bandtoOut-band？（）

A.QoSToS/DSCPvaluesarerequiredtobeforwardedtransparently

B.Deviceredundancyisrequired

C.Per-userACLsupportisrequired

D.Multicastservicesupportisrequired

A.ThedesignsupportsmultipleserversubnetsCisco642-874：PracticeExam

B.Anend-userseestheIPaddressoftherealserver

C.SLBroutesbetweentheoutsideandinsidesubnets

D.ThesourceordestinationMACaddressisrewritten，buttheIPaddressesleftalone

E.SLBactsasa"bumpinthewire"betweenserversandupstreamfirewallorLayer3devices

A.流量控制

B.数据加密

C.路径确定

D.连接建立

E.错误恢复

F.比特传输

G.数据表示

A.Thebusislimitedto32devices

B.Itisafullduplexserialstandard

C.Itisahalf-duplexserialstandard

D.Itallowsupto320MB/sofsharedchannelbandwidth

A.IPaddressspaceisdifficulttomanage.

B.Broadcastandfaultdomainsarcincreased

C.ConvergencetimeisfractionallyslowerthanSTP

D.LimitsonclusteringandNICteamingareremoved

E.Fastuplinkconvergenceissupportedtorfailoverandfallback

A.whenthedesignimplementsLayer2betweentheaccessariddistributionblocks

B.whenmultiplevendordevicesneedtobesupported

C.whenpreempttuningofthedefaultgatewayisneeded

D.whenarobustmethodofbackingupthedefaultgatewayisneeded

E.whenthedesignimplementsLayer2betweentheaccessswitchandthedistributionblocks

F.whenthedesignimplementsLayer2betweentheaccessanddistributionblocks

A.数据包将被发送到服务器，因为发送端口是基于服务器的。

B.数据包将被发送到Switch2并不会离开该交换机，因为这些数据包仅限于本地。

C.数据包将被发送到笔记本主机。

D.发送到Router1的数据包将被丢弃，因为私有地址无法在Internet上传输。

E.数据包将被发送到Router2并被丢弃，因未与服务器直接连接

A.OSPFstubareascanbethoughtofasasimpleformofsummarization

B.OSPFcannotfilterintraarearoutes

C.AnARRranonlyexistintwoareas-thebackboneandoneadjacentarea

D.PerformanceissuesintheBackboneareacanbeoffsetbyallowingsometraffictotransitanon-backbonearea

E.thesizeofanarea（theLSDB）willbeconstrainedbythesizeoftheIPMTU

A.EliminatethemanagementandsupportforredistributionbychoosingandcuttingovertoasingleIGPatthetimeofmerger

B.Maintaindistinctpocketsacrossamovingboundaryofroutingprotocols，redistributingbetweenthem

C.ManipulatetheadministrativedistanceofthedifferentIGPstobeequalthroughoutthenetwork

D.LeavetheIGPsindependentwithoutredistributionwherevercommunicationbetweencompanyentitiesisnotrequired