Which technology is often used to manage copyright protections for digital content?

The correct answer is HDCP because it stands for High-bandwidth Digital Content Protection, a technology designed to prevent unauthorized copying and transmission of digital content over HDMI and other digital interfaces. HDCP encrypts the digital signal, ensuring that only compliant devices can receive and display the protected content. This is crucial for maintaining the integrity of copyrighted materials such as movies, TV shows, and streaming services, as it discourages piracy and unauthorized distribution.

The other technologies mentioned serve different purposes. EDID (Extended Display Identification Data) is primarily used for communication between a display and a source device to ensure proper format and resolution settings but does not manage copyright. RS232 is a standard for serial communication typically used for controlling devices like projectors and audio amplifiers, and it does not provide any content protection features. MHL (Mobile High-Definition Link) allows mobile devices to connect to HDMI displays while transferring both audio and video signals, but it does not inherently manage copyright protections.