RAIC is supported by a national database to verify card validity in real time.

RAIC is supported by a national database to verify card validity in real time.

• A. A national database
• B. A local spreadsheet
• C. A paper log
• D. A distributed ledger

Answer: (A)

Real-time verification works best when there is a single, authoritative source of truth that all validators can query quickly. A national database serves as this central repository, continuously updated with the current status of every card. When a RAIC check is performed, you get an immediate, consistent answer because all verifiers look to the same trusted source, ensuring uniform validity across the country. A local spreadsheet can’t keep up with updates from issuing authorities or revocations across multiple sites; data would quickly go out of date and queries wouldn’t be reliably centralized. A paper log isn’t digital and can’t support fast, automated, nationwide lookups. A distributed ledger, while offering immutability and decentralization, introduces complexity and potential latency that aren’t necessary when a centralized national database can provide fast, scalable real-time validation. So, the national database is the best choice because it delivers a single, up-to-date source for instant card validity checks across the entire system.

Real-time verification works best when there is a single, authoritative source of truth that all validators can query quickly. A national database serves as this central repository, continuously updated with the current status of every card. When a RAIC check is performed, you get an immediate, consistent answer because all verifiers look to the same trusted source, ensuring uniform validity across the country.

A local spreadsheet can’t keep up with updates from issuing authorities or revocations across multiple sites; data would quickly go out of date and queries wouldn’t be reliably centralized. A paper log isn’t digital and can’t support fast, automated, nationwide lookups. A distributed ledger, while offering immutability and decentralization, introduces complexity and potential latency that aren’t necessary when a centralized national database can provide fast, scalable real-time validation.

So, the national database is the best choice because it delivers a single, up-to-date source for instant card validity checks across the entire system.