Which of the following is not classified as an access control?

The correct answer is random access because it does not directly pertain to access control mechanisms or policies typically implemented within security frameworks. Access controls are generally defined systems or methods used to manage who can view or use resources within an environment, and they can be categorized into physical access (like building access) and digital access (like developer and customer access).

In contrast, random access refers to the ability to access data elements in any order, without having to follow a sequential path. This term is mostly used in the context of computer memory or data structures rather than to describe how access permissions are granted or enforced in security protocols. As such, random access stands apart from the other choices, which are directly linked to defined permissions and controls that manage access to resources.