(NOTE) Notes to myself
=====Section A
Why A2-option2 doesn't belong to A1?
* A1 uses one infrastructure. adding cellular network is interpreted as an external "instance" since cellular data is provided by external party.
* Same for A4-option2
=====Section C
* App Server at Institute 2 cannot act as DBE (encryption)
* App Server at Institute 1 can act as DBE (no encryption needed)