Which routing protocol supports a flexible area structure using routing levels one and two？（）

单项选择题Whichsite-to-siteVPNsolutionallowsCiscorouters，PIXFirewalls，andCiscohardwareclientstoactasremoteVPNclientsinordertoreceivepredefinedsecuritypoliciesandconfiguration parametersfromtheVPNheadendatthecentralsite？（）

A. Easy VPN
B. GRE tunneling
C. Virtual Tunnel Interfaces
D. Dynamic Multipoint VPN
E. Group Encrypted Transport VPN

单项选择题WhendesigningtheWANmodulewithintheenterpriseedge，whichdocumentisusedtospecify theconnectivityandperformanceagreementswiththeserviceprovider？（）

A. RFP
B. RFC
C. SLC/SLA
D. SOW

单项选择题YouaretheCiscoNetworkDesigner.WhichoftheseisleastimportantwhendetermininghowmanyusersaNAScansupport？（）

A. bandwidth
B. number of plug-ins per scan
C. total number of network devices
D. number of checks in each posture assessment

单项选择题AcmeNutritionmanufacturesawidevarietyofvitaminsupplements.Ithasasinglemanufacturing facilitywith3regionalwarehousesand16districtsalesoffices.Currentlythemanufacturingfacilityrequires210IPaddresses；eachwarehouserequires51IPaddresses；eachdistrictsalesofficerequires11IPaddresses；andtheIPWANrequires38IPaddresses.ifAcmeNutritionplansfor20percentgrowthinfacilities，howmanyClassCsubnetswillthedistrictsalesofficesrequire？（）

A. 19 （3 from the warehouse range and 16 from a separate Class C address）
B. 19 （3 from the warehouse block， 15 from a separate Class C block and 1 from the IP WAN block）
C. 20 （4 from the warehouse range，15 from a separate Class C block and 1 from the IP WAN block）
D. 16 （3 from the warehouse range and 13 from a separate Class C address）

单项选择题InaVoWLANdeployment，Itisrecommended（）dBmseparationbetweencellswiththesame channel.

A. 6
B. 7
C. 10
D. 19