Of the choices provided, security and control are least likely to increase. With a public cloudbased solution, the service provider, not the customer, controls the cloud infrastructure and devices. Therefore, physical security of the data and hardware is no longer in the customer's control. In addition, resources stored in the public cloud are typically accessed over the Internet. Care must be taken so that the data can be accessed securely.
Availability, redundancy, mobility, and scalability are all likely to increase by moving to a public cloudbased solution. Cloudbased resources are typically spread over several devices, sometimes even in multiple geographic areas, thereby ensuring availability. If one device or location becomes unavailable, other devices and locations can handle the workload. Data stored on cloudbased resources can be copied or moved to other devices or locations, thereby increasing redundancy and mobility. As usage increases, additional devices can be brought online, thereby providing scalability.