We aren't sure whether you question is direcly related to Orion Server, or Oracle Server?
Please let us know which one it relates to so that it can be in the best forum to get you an answer.
Unfortunately I am not familiar with Durablility per say. I know it is a JMS issue. And I read about them in an EJB
2.0 book/specification for the scbcd, but the exam didn't need this information.