COMMUNICATION MODEL, SIGNAL, METHOD, AND DEVICE FOR CONFIRMING REACHABILITY IN NETWORK WHERE HOST REACHABILITY IS ACCOMPLISIHED BY RELATING STATIC IDENTIFIER TO DYNAMIC ADDRESS

摘要

PROBLEM TO BE SOLVED: To provide a fundamental mechanism for managing apparatuses having dynamic IP addresses by solving the problem that, although a host computer can be usually monitored to confirm whether the host computer is active or inactive using a ping command to monitor an apparatus in managing the host computer provided with an IP address on a TCP/IP network, a dial-up host computer cannot be managed because its IP address changes and the apparatus to be managed seems to be operated even if a host computer not to be managed responds to the ping.;SOLUTION: It is confirmed whether the host computer having a dynamically changing IP address is active or inactive, and is genuine or not by using a sign and counter-sign. Also, when usual management is conducted, although a conventional host computer having a changing IP address is not managed, using this method as processing prior to the usual management enables higher management thereafter (e.g. monitoring CPU load or network traffic).;COPYRIGHT: (C)2004,JPO&NCIPI