Which of the following practices is not associated with TEMPEST recommendations?

The practice of access control to classified areas is not specifically associated with TEMPEST recommendations. TEMPEST is primarily focused on protecting sensitive electronic equipment from the unintentional emanations of electromagnetic signals. Its guidelines and recommendations are concerned with shielding, filtering, and physical layouts to prevent unauthorized interception of these signals, which may carry sensitive information.

In contrast, access control to classified areas is a general security measure that applies to physical security rather than electromagnetic security. While both concepts play crucial roles in the overarching security framework of sensitive information, they serve different purposes. Access control is about restricting physical entry to authorized personnel, whereas TEMPEST deals with safeguarding against information leakage through electronic emissions. Thus, the correct answer highlights that the direct applicability of access control does not fall under TEMPEST-specific practices.