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 security product line uses deep inspection to identify and prevent malicious attacks,resource misuse, and unauthorized access?（）
多项选择题 What are two appropriate uses for Internet Protocol TV broadcasting (IP/TV) technology? （）