Portable information terminal supporting different communications protocol

摘要

A handy terminal 10 is used in a communication system comprising a network in which communication is performed according to a TCP/IP and a network cradle 50 that is provided on the network. The handy terminal 10 communicates with the network cradle 50 according to P2P protocol, and is connected to the network through the network cradle 50. The handy terminal 10 comprises a communication unit that transmits, to the network cradle 50 according to the P2P protocol, second data that includes first data and a second header in P2P protocol. The first data includes a first header that has a specific address of the portable information terminal as a transmission source specific address in IP protocol.