DLC may refer to any of the following:
1. Short for Data Link Control, DLC is the service provided by the Data Link Layer in the OSI network model.
2. Short for downloadable content, DLC is additional content that can be downloaded. For example, many of the most popular games have downloadable content that can add additional levels, bonuses, weapons, and other items into the game. The price of DLC can range from free to a few dollars. Today, many free games, especially those on mobile platforms, are supported with non-free DLC.
3. Short for digital loop carrier, DLC is a hardware device used to convert multiple analog telephone signals into digital signals that can then be transferred over a single connection.