A method and apparatus for enabling congruent multicast and unicast routing in a Virtual Private Network are disclosed. The apparatus, when used with a centrifuge, allows for the creation of at least three fractions in the apparatus. The spatial frequencies of the relief structures in the mosaic surfaces are of values from predetermined spatial frequency ranges in such a way that, in the case of illumination beams which are incident obliquely relative to a normal onto the plane of the layer composite, the relief structures of the mosaic surfaces deflect visible monochromatic light parallel to the normal. When the PDSN is not prepaid capable but supports session termination capability, the HAAAPPS determines that any type of prepaid service can be allowed and supported by the HAAAPPS in combination with the HA. When the mechanism causes the relative movement from the first position to the second position, the controller operates the mechanism for a predetermined duration to substantially eliminate the slackness of the web resulting from the relative movement. The gateway CGI packages information from the call to send by secure socket connection to a server-like access control program on a secure host system which can reconstitute the call if authenticated andor validated and serve the request, returning the sought after data or resource through an encrypted channel if desired.