Explanation/Reference:
Explanation:
A keyboard-video-mouse (KVM) system is commonly used for directly accessing server terminals in a data center. It is not a method that would be possible within a cloud environment, primarily due to the use virtualized systems, but also because only the cloud provider's staff would be allowed the physical access to hardware systems that's provided by a KVM. Hypertext Transfer Protocol Secure (HTTPS), virtual private network (VPN), and Transport Layer Security (TLS) are all technologies and protocols that are widely used with cloud implementations for secure access to systems and services.

Explanation
The standards put out by the International Data Center Authority (IDCA) have established the Infinity Paradigm, which is intended to be a comprehensive data center design and operations framework. The Infinity Paradigm shifts away from many models that rely on tiered architecture for data centers, where each successive tier increases redundancy. Instead, it emphasizes data centers being approached at a macro level, without a specific and isolated focus on certain aspects to achieve tier status.

SaaS most commonly uses client-side key management. With this type of implementation, the software for doing key management is supplied by the cloud provider, but is hosted and run by the cloud customer.
This allows for full integration with the SaaS implementation, but also provides full control to the cloud customer. Although the cloud provider may offer software for performing key management to the cloud customers, with the Infrastructure, Platform, and Desktop as a Service categories, the customers would largely be responsible for their own options and implementations and would not be bound by the offerings from the cloud provider.

The standards put out by the National Fire Protection Association (NFPA) cover general fire protection best practices for any type of facility, but also specific publications pertaining to IT equipment and data centers.