多项选择题
A. site-to-site VPN for remote offices
B. business-grade firewall
C. Cisco IOS software-based
D. email security
E. XML support
F. premium support via SMARTnet
单项选择题 WhichcombinationofportsisavailableontheCiscoSPA8800voicegateway？（）
多项选择题 QoSreferstotheabilityofanetworktoprovideimprovedservice，overvariousunderlyingtechnologies，toselectnetworktraffic.WhichtwotraitsareinherenttoQoS？（）
多项选择题 CiscoConfigurationAssistantsupportsavarietyofvirtualprivatenetworks.WhichthreetypesofVPNcanbeconfiguredbyusingCCA？（）