what stage is the most inner part of the web architecture where data such as, customer names, address, account numbers, and credit card info is the store?

Never store the card-validation code or value (three- or four-digit number printed on the front or back of a payment card used to validate card-not-present transactions). Never store the personal identification number (PIN) or PIN Block. Be sure to mask PAN whenever it is displayed.

Ihave never used that feature before but i think it's true

Solution: the categorization of functional and non-functional requirement are as follows: some of the more typical functional requirements include: • business rules• transaction corrections, adjustments and cancellations• administrative functions• authentication• authorization levels• audit tracking• external interfaces• certification requirements• reporting requirements• historical data• legal or regulatory requirementswhile,some typical non-functional requirements are: • performance – for example response time, throughput, utilization, static volumetric• scalability• capacity• availability• reliability• recoverability• maintainability• serviceability• security• regulatory• manageability• environmental• data integrity• usability• interoperability