o-------------------o                       o-------------------o
  |   Config client   |                       |   Config client   |
  o-------------------o                       o-------------------o
           ||                                          ||
   NETCONF || RESTCONF                         NETCONF || RESTCONF
           ||                                          ||
  o-------------------o                       o-------------------o
  |   Config server   |                       |   Config server   |
  | (Figures 3 and 5) |                       | (Figures 4 and 6) |
  +-------------------+                       +-------------------+
  |   Control-Client  | <-- TWAMP-Control --> |      Server       |
  |                   |                       |                   |
  |   Session-Sender  |  <-- TWAMP-Test -->   | Session-Reflector |
  +-------------------+                       +-------------------+