Enhancement Supplemental Guidance: This control enhancement, in general, applies to server rooms, communications centers, or any other areas within a facility containing large concentrations of information system components or components with a higher impact level than that of the majority of the facility. The intent is to provide an additional layer of physical security for those areas where the organization may be more vulnerable due to the concentration of information system components or the impact level of the components. The control enhancement is not intended to apply to workstations or peripheral devices that are typically dispersed throughout the facility and used routinely by organizational personnel.