Diagnostic system for a distributed data access networked system

A diagnostic system for a data access networked system that includes a plurality of data service systems coupled together, comprising:

• (A) a plurality of diagnostic modules, each within one of the data service systems and running a number of diagnostic tests to check modules within that data service system upon receiving a diagnostic request, wherein each of the data service systems is independently administrated such that modules within each data service system cannot be directly accessed by external source and the diagnostic modules transmit diagnostic requests and diagnostic results to one another using an open standard communication protocol, wherein if a first diagnostic module in a first data service system wants to diagnose modules in a second data service system, the first diagnostic module is not allowed to directly access these modules in the second data service system and must transmit a diagnostic request, using the open standard communication protocol, to activate a second diagnostic module in the second data service system which then sends the diagnostic results of these modules back to the first diagnostic module;
• (B) a diagnostic terminal coupled only to the first diagnostic module of the diagnostic modules to generate the diagnostic request to the first diagnostic module and display the diagnostic results received from the first diagnostic module via the open standard communication protocol.