Abstract: A master-slave network control system and method of operation wherein the master node element has substantially absolute invasive control over functions and capabilities of slave node elements which are logged onto the network and wherein the master node element can exercise latent control over slave node elements when not logged on to the network by controlling reacceptance onto the network in order to promote selected pedagogical and like functions facilitated through networked communication between the master node elements and the slave node elements.

Abstract: A method for controlling physical security of a computer removably coupled to a network wherein a security administrator associated with a server invokes a timer in a client computer and disables the client computer if the computer is not operated within the network with a frequency preset by the security administrator. Techniques are provided in the client computer to inhibit breach of the security of the timer.

Abstract: A space multiplexed wireless interconnection system employs an array of overhead access points in a first plane and selected client node points at arbitrary locations and orientations in a second plane, with server transceivers disposed in an ordered array at the access points and illuminating a radiation region over a substantial portion in said second plane, and with at least one complementary transceiver disposed in the second plane in a client node host device, wherein at least one of the complementary transceivers provides a radiation and reception pattern sufficiently narrow to capture one and only one of the first access points for a session of communication so that the server transceivers can control communication with multiple complementary transceivers and each complementary transceiver can communicate with only one server transceiver.