Follow the request/data flow through the architecture.
Work through each concept and mark it understood. This unlocks the knowledge check.
Global security standard for handling credit card data.
Why it matters
Required by card networks for any merchant processing payments.
When to use it
Apply to systems that store, process, or transmit cardholder data (CHD).
Gotcha (exam trap)
PCI scope is defined by data flow — reduce scope by tokenization and using PSPs, not just by adding firewalls.
Finish the walkthrough above to unlock the check.
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