A system for creating a group network between network devices (D1, D2, D3) belonging to one or more local networks, the system comprising a server arrangement that is communicably coupled to one or more group network devices (102a-c, GND) associated with the one or more local networks, each local network having a given group network device, wherein the given group network device is dynamically installed at a given local network, and wherein the server arrangement is configured to: (i) employ the one or more group network devices to discover a plurality of network devices connected to the corresponding local networks; (ii) receive information indicative of the plurality of network devices discovered by the one or more group network devices or selected by a user from amongst the discovered network devices for creation of the group network; (iii) assign the plurality of network devices to the group network, and define the plurality of network devices as members of the group network; and (iv) employ the one or more group network devices to automatically perform network configurations for the plurality of network devices, the members of the group network being connected to a same physical local network or to different geographically-separated physical local networks, thereby creating the group network for enabling the members of the group network to communicate and interoperate with each other in native protocols, wherein the group network supports different types of transmission paths and/or different transmission protocols defined by the transmission paths to allow the one or more group network devices to communicate with each other, further wherein the given group network device of the one or more group network devices, to automatically perform the network configurations for the plurality of network devices, is configured to: - calculate an Internet Protocol, IP, network or subnetwork address configuration pertaining to a given network device of the plurality of the network devices, based upon the plurality of network devices discovered on all physical segments of the local network that belong to the group network; - assign IP addresses, subnet masks and a gateway to the network devices, based upon the calculated IP network or subnetwork address configuration pertaining to the given network device of the plurality of the network devices; and - configure the network devices using the assigned IP addresses, subnet masks and gateway. (i) employ the one or more group network devices to discover a plurality of network devices connected to the corresponding local networks; (ii) receive information indicative of the plurality of network devices discovered by the one or more group network devices or selected by a user from amongst the discovered network devices for creation of the group network; (iii) assign the plurality of network devices to the group network, and define the plurality of network devices as members of the group network; and (iv) employ the one or more group network devices to automatically perform network configurations for the plurality of network devices, the members of the group network being connected to a same physical local network or to different geographically-separated physical local networks, thereby creating the group network for enabling the members of the group network to communicate and interoperate with each other in native protocols, wherein the group network supports different types of transmission paths and/or different transmission protocols defined by the transmission paths to allow the one or more group network devices to communicate with each other, further wherein the given group network device of the one or more group network devices, to automatically perform the network configurations for the plurality of network devices, is configured to: - calculate an Internet Protocol, IP, network or subnetwork address configuration pertaining to a given network device of the plurality of the network devices, based upon the plurality of network devices discovered on all physical segments of the local network that belong to the group network; - assign IP addresses, subnet masks and a gateway to the network devices, based upon the calculated IP network or subnetwork address configuration pertaining to the given network device of the plurality of the network devices; and - configure the network devices using the assigned IP addresses, subnet masks and gateway. - calculate an Internet Protocol, IP, network or subnetwork address configuration pertaining to a given network device of the plurality of the network devices, based upon the plurality of network devices discovered on all physical segments of the local network that belong to the group network; - assign IP addresses, subnet masks and a gateway to the network devices, based upon the calculated IP network or subnetwork address configuration pertaining to the given network device of the plurality of the network devices; and - configure the network devices using the assigned IP addresses, subnet masks and gateway.