With software-defined networking (SDN), the filtering of network traffic is separated from the forwarding of network traffic so that it can be independently administered.

Explanation/Reference:
Explanation:
Portability is the ability for a cloud customer to easily move their systems, services, and applications among different cloud providers. By avoiding reliance on proprietary APIs and other vendor-specific cloud features, an organization can maintain flexibility to move among the various cloud providers with greater ease. Reversibility refers to the ability for a cloud customer to quickly and easy remove all their services and data from a cloud provider. Interoperability is the ability to reuse services and components for other applications and uses. Scalability refers to the ability of a cloud environment to add or remove resources to meet current demands.

Explanation/Reference:
Explanation:
The locality--or physical location and jurisdiction where the system or data resides--is the dominant driver of regulations. This may be based on the type of data contained within the application or the way in which the data is used. The contract and SLA both articulate requirements for regulatory compliance and the responsibilities for the cloud provider and cloud customer, but neither artifact defines the actual requirements. Instead, the contract and SLA merely form the official documentation between the cloud provider and cloud customer. The source of the data may place contractual requirements or best practice guidelines on its usage, but ultimately jurisdiction has legal force and greater authority.