单项选择题
A. policy control
B. active participation
C. systems-level approach
D. application and service optimization
多项选择题 Fromsmallbusinessestolarge-scaleenterprises，whichtwobestdescribehowtheCiscoUnifiedWirelessNetworkreducesoveralloperationalexpenses？（）
多项选择题 InwhichtwowaysdoesanintegratedsecuritysolutionreduceTCO？（）
单项选择题 TherearefourmainCiscocertificationlevelsthatyoucanattainasacertifiedCiscoprofessional.Whatisthehighestlevelofcertificationthatisoffered？（）