单项选择题
A.reduces the downtime that is asassocoated with spam,viruses,and blended threats that are delivered via email
B.determines if A user or device is authorized to access A switch port
C.defends thepenmeter from malicious users and unauthorized traffic
D.providesA secure communication path through the internet
多项选择题 What are three benefit that the Smart Business Architecture provides to customers?（）
单项选择题 Which cisco product family is the recommended platform for 10 gigabit ethernet in the datacenter?（）
单项选择题 Which tool provides A complete guide that makes it easier for partners, regardless of theirexperience level, to sell cisco unified communications solutions to their customers?（）