单项选择题
A. upgrade discounts
B. Free CCO account
C. Cisco Learning Credits
D. around-the-clock access toCisco Technical Access Center
单项选择题 nwhatwaydoesCiscoSMARTnethelpcustomersprotecttheirnetworkinvestments？（）
单项选择题 ThefollowingCiscoCatalystSeriesswitchesfitintheaccessarea.Whichswitchesalsoutilize StackWisetechnologytoaddresstheneedsofcompanieswithgrowingnetworksbyallowing them toconnect？（）
多项选择题 Whatarethetwobenefitsofanyintelligentnetworkthatusesasystems-levelapproachto integrateapplicationsandservicesacrossaninfrastructure？（）