单项选择题
Which of the following is less vulnerable to threats and attacks because it is not associated with one specific operating system？（）
A.Cisco Voice and Video over VPN B.Cisco Secure Access Control Server C.Cisco NAC Appliance D.Cisco Threats Response
多项选择题 WhichtwowaysdoesanintegratedsecuritysolutionreduceTCO？（）
多项选择题 Whicharethreechallengesandtrendsthataredrivingtheneedfortechnologyintheretailmarket？（）
单项选择题 Inwhichofthesephasesisacustomerscurrentnetworkinfrastructureassessed？（）
