Network node and communication system

摘要

The disclosed invention provides a network system that achieves connecting a terminal to a plurality of networks simultaneously and forwarding packets correctly. The network system is built such that an access node connected with a terminal and a network are connected by a relay node and includes an authentication node with which the terminal can communicate and which assigns the terminal an address associated with the network. The address assigned to the terminal is mapped to identification code of the relay node and stored on the access node.