In a router provided on a boundary between the Internet and an intranet and used for receiving an incoming first packet and then passing on the first packet to a destination router indicated by a destination address of the first packet, the router includes a decapsulation unit for carrying out a process...http://www.google.fr/patents/US7031310?utm_source=gb-gplus-shareBrevet US7031310 - Router and IP-packet-transferring method
