多项选择题
A. reference to network ability to provide improved service to all network traffic
B. reduction in delay， jitter， and packet loss
C. equal handling of all packets
D. support for real-time applications
E. best-effort actions
多项选择题 CiscoConfigurationAssistantsupportsavarietyofvirtualprivatenetworks.WhichthreetypesofVPNcanbeconfiguredbyusingCCA？（）
多项选择题 WhichthreeareintegratedSmartApplicationsincludedwiththeCiscoUnifiedCommunications500Series？（）
单项选择题 WhatstatementistrueofhowacustomeracquiresIntrusionPreventionandContentSecurityservicesinaCiscosecuritysolution？（）