NETWORK SYSTEM, NETWORK CONNECTION ESTABLISHING METHOD, NETWORK TERMINAL, COMPUTER PROGRAM, AND RECORDING MEDIUM STORING PROGRAM

摘要

PROBLEM TO BE SOLVED: To solve the problem that an IP address has had to be transmitted to the other end of the Internet at every establishment of connection in the cases that the IP address different every time Internet connection is started is assigned.

SOLUTION: In a peer-to-peer network system 10, a first network terminal 12 sends request messages to a host terminal 16. The host terminal 16 receives the request messages to extract the IP address of the first network terminal 12 from the request messages. Also, a second network terminal 14 sends the request messages to the host terminal 16. The host terminal 16 receives the message. The host terminal 16 sends return messages containing the IP address of the first network terminal 12 to the second network terminal 14, which extracts the IP address of the first network terminal 12 from the return messages. Consequently, the second network terminal 14 starts peer-to-peer communication with the first network terminal 12 on the basis of the IP address.

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