单项选择题
A.reduces the downtime that is as assocoated with spam,viruses,and blended threats that are delivered via email
B.defends the penmeter from malicious users and unauthorized traffic
C.provides A secure communication path through the internet
D.determines if A user or device is authorized to access A switch port
多项选择题 Which three benefits are provided by the implementation of cisco c-series servers into A virtualized data center environment?（）
单项选择题 Which cisco product family is the recommended platform for 10 gigabit ethernet in the data center?（）
单项选择题 In which area of the campus LAN are the user computers attached to the network?（）