[dev] Device Discovery Inputs

[Ravee]

Hi,

For the applications using IoTivity stack, are there any guidelines for
discovery handling?


   - I believe, application need to maintain the device discovery results.
   - Active vs Passive(Presence) Discovery. Is it suggested, to incorporate
   both of these into Application design?
   - Let's say, after having Device scan results, how to ensure the
   Device(s) are still reachable? Is it recommended to do a ping in a
   background thread and remove unreachable devices, from the scan list?

-Ravee