Ethernet adapters; Ethernet cables; Ethernet controllers; Ethernet repeaters; Ethernet switches; Ethernet transceivers; Computer apparatus, namely, a converter that superimposes an Ethernet signal on an existing cable; Computer network switches; Computer network adapters, switches, routers and hubs; Computer network hubs, switches and routers; Electro-optic transducers; Free-space optics transmission systems, Ethernet switches and routers, and software sold both as components thereof and sepa...