| 摘要 |
A data backup apparatus determines whether a version serial number of data backed up in a network management system matches a version serial number of data stored in a data version serial number management field of an update history management area, upon having the network management system back up update data generated in a data processing apparatus. Upon a match of the version serial numbers of respective data, the data processing apparatus transfers only update data stored in the data update history management area via a communications link to the network management system. Upon a mismatch of the version serial numbers of respective data, the data processing apparatus transfers all data, including data other than update data, stored in an EEPROM of the data processing apparatus, to the network management system.
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