单选题The cisco ironport portfolio performs which service?（）A reduces the downtime that is asassocoated with spam,viruses,and blended threats that are delivered via emailB defends thepenmeter from malicious users and unauthorized trafficC providesA secure co
题目
单选题
The cisco ironport portfolio performs which service?（）
A
reduces the downtime that is asassocoated with spam,viruses,and blended threats that are delivered via email
B
defends thepenmeter from malicious users and unauthorized traffic
C
providesA secure communication path through the internet
D
determines if a user or device is authorized to access a switch port
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参考答案和解析
正确答案：
B
解析：
暂无解析