RADIUS accounting

Dears,

what's the meaning of accounting in radius aaa ?
is it means measuring of consumed resources only or users' activities like
executed commands for example on an ssh service is being logged ?
i did read the wikipedia article about radius which contains description of
the Accounting protocol and also i did read the Accounting RFC of RADIUS,
but still i can't understand this point.

if any one can help me to clarify this point, his help is more than
appriciated.

Thanks & Best Regards,


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Mohamed M. Hagag
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