多项选择题 Which three are Cisco architectures?（）

单项选择题 Which Cisco product family can simultaneously implement firewall, VPN, content security, network access control, virtualization, anD content filtering?（）

单项选择题 The Services-Ready Engine is an optional module of the Cisco ISR family. It includes onboard CPU and memory to run advanced applications. Which of these is an example of an advanced application that runs on the Services-Ready Engine?（）