What can an organization use to mediate the copying of tagged data and restrict it to authorized media?

The correct answer is Data Loss Prevention (DLP). DLP solutions are specifically designed to monitor, detect, and control data transfer within and outside of an organization. They provide the capability to identify and protect sensitive data by enforcing policies that dictate how data can be copied, shared, or transferred. This includes tagging data and ensuring that only authorized users and media can access or handle that data, thus preventing unauthorized copying or potential data leaks.

In contrast, a firewall primarily controls incoming and outgoing network traffic based on predetermined security rules, but it does not have the specificity or functionality to manage the copying of tagged data at the file or application level. An access control list manages permissions for users on an individual resource basis, but it lacks the comprehensive monitoring and control features associated with DLP. An intrusion detection system focuses on identifying and responding to suspicious activities or breaches within a network rather than managing data movement. Therefore, DLP is the most suitable solution for mediating data copying and ensuring compliance with data protection policies.