单项选择题
A. OSPF
B. EIGRP
C. IS-IS
D. BGP
单项选择题 Whichsite-to-siteVPNsolutionallowsCiscorouters，PIXFirewalls，andCiscohardwareclientstoactasremoteVPNclientsinordertoreceivepredefinedsecuritypoliciesandconfiguration parametersfromtheVPNheadendatthecentralsite？（）
单项选择题 WhendesigningtheWANmodulewithintheenterpriseedge，whichdocumentisusedtospecify theconnectivityandperformanceagreementswiththeserviceprovider？（）
单项选择题 YouaretheCiscoNetworkDesigner.WhichoftheseisleastimportantwhendetermininghowmanyusersaNAScansupport？（）