+--+
....................   ----------|S1|
.    +---+         . /           +--+
.    | C1|----+    ./     DOTS Server Domain #1         
.    +---+    |    .
.             |   /.
.+---+      +-+-+/ .  
.| C3|------| G |  .
.+---+      +-+-+\ . 
.            CPE  \.
.     +---+    |   . 
.     | C2|----+   .\
.     +---+        . \          +--+
'..................'  ----------|S2|
                                +--+
 DOTS Client Domain     DOTS Server Domain #2