This invention presents a digital network system able to concurrently provide multimode internetworking connectivity session over a plurality of disparate network systems, from User Premise Device (UPD) to NSP, CSP or ASP network gateways, and providing a plurality of internetwork environment. The invention also provide the methods for the support of the following internetworking connectivity services, concurrently:—a) public and shared-media Internet services; b) MPLS-enabled and IP-based Virtual Private Network (VPN) services; c) hybrid network system connection sessions among disparate connection-oriented and connectionless network systems; and d) end-to-end, connection-oriented, and circuit-switching connection sessions for VDMI-based application services through digital transceiver, be it xDSL or VCC-based land-line or wireless medium.