多项选择题 Deploying the cisco unified computing system platform into the data center provides which two benefits?（）

多项选择题 Cisco collaboration applications and services can be hosted in A number of ways, which three are valid hosting models?（）

单项选择题 A service provider wants to prevent the repeat of a denial of service (DoS) attack that recently disabled Internet access for several thousand customers. Which Cisco solution best matches this business need?（）