The National Fire Protection Association (NFPA) publishes a broad range of fire safety and design standards for many different types of facilities. Building Industry Consulting Services International (BICSI) issues certifications for data center cabling. The Uptime Institute publishes the most widely known and used standard for data center topologies and tiers. The International Data Center Authority (IDCA) offers the Infinity Paradigm, which takes a macro-level approach to data center design.

Explanation/Reference:
Explanation:
It is imperative that an application perform checks when each function or portion of the application is accessed, to ensure that the user is properly authorized to access it. Without continual checks each time a function is accessed, an attacker could forge requests to access portions of the application where authorization has not been granted.

Explanation/Reference:
Explanation:
Background checks are controls for attenuating potential threats from internal actors; external threats aren't likely to submit to background checks.