Data Access Control System (DACS) is an example of which description?

• A. The standard middleware software to send and receive incoming and outgoing data from suppliers and exchanges
• B. The name given to market data circuits used to manage and control datafeeds
• C. A data analytics dashboard for monitoring market volatility
• D. A data distribution entitlement control system to enable access or prevent access to data and generate an audit trail of entitled users

Answer: (D)

The main idea here is controlling who can access data and keeping a record of that access. A Data Access Control System (DACS) enforces entitlements—determining who is allowed to view or receive data and who isn’t—and it logs every access or attempt in an audit trail. This combination of access enforcement plus traceability is what makes DACS a data distribution entitlement control system: it guards data distribution and provides accountability for who accessed it.

The other descriptions describe moving data through middleware, delivering data feeds via circuits, or visualizing data in a volatility dashboard. Those functions relate to data movement or analysis, not to restricting access or recording access events.