1.1.3 Examine data-flow diagram and interview personnel to verify the diagram:
• Shows all cardholder data flows across systems and networks.
• Is kept current and updated as needed upon changes to the environment.
Cardholder data-flow diagrams identify the location of all cardholder data that is stored, processed, or transmitted within the network.
Network and cardholder data-flow diagrams help an organization to understand and keep track of the scope of their environment, by showing how cardholder data flows across networks and between individual systems and devices.