DRM tools use a variety of methods for enforcement of intellectual property rights. Which of the following is NOT included?

Digital Rights Management (DRM) tools are designed to protect and enforce intellectual property rights by controlling how digital content is used and distributed. Among the various methods employed, some techniques are more common and relevant than others.

Media-present checks involve verifying the existence of physical media as part of access control, which is a recognized DRM method. Similarly, support-based licensing is a method where end-users must adhere to licensing agreements that dictate how software or content can be used, making it an integral part of DRM enforcement. Local agent enforcement refers to mechanisms where the enforcement is handled locally on the user's device, allowing for consistency in terms of how rights are upheld.

On the other hand, dip switch validity is not a standard method used in modern DRM systems. Dip switches are hardware-based controls that are typically used in older electronic devices to set parameters; they are not relevant to the digital landscape of DRM enforcement, which is primarily software-based and focuses on digital content protection through more sophisticated means. Thus, identifying dip switch validity as not included in the typical methods of DRM enforcement underscores its irrelevance in the current context of protecting intellectual property rights in a digital environment.