()   ()   ()       |
  ()  () () ()     / \       +---------+
() () () () () () /   \======|    ^    |             +-----------+
 ()  ()   ()     |           | <--|--> |             |Application|
()  ()  ()  ()  / \==========|    v    |=============|   Server  |
  ()  ()  ()   /   \         +---------+             +-----------+
 Dev            RGWs             NGW                      App