Abstract: A telecommunications device, operable in a system comprising one or more servers, the device being a client device in the system. The device is constructed and adapted to: provide a client configuration state for the client device to the one or more servers; and obtain from the one or more servers a first sub-network configuration, comprising at least one path from the one or more servers to the client device, and being based on the client configuration state and on at least one other client configuration state of at least one other client device. The device can use a path specified in the first sub-network configuration to obtain at least one resource via the one or more servers.