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