fig40.txt

+--------+  +--------+  +--------+
| Client |  | Client |  | Client |
+--------+  +--------+  +--------+
|  REQ   |  |  REQ   |  |  REQ   |
+---+----+  +---+----+  +---+----+
    |           |           |
    +-----------+-----------+
                |
            +---+----+
            | ROUTER |
            +--------+
            | Device |
            +--------+
            | DEALER |
            +---+----+
                |
    +-----------+-----------+
    |           |           |
+---+----+  +---+----+  +---+----+
|  REP   |  |  REP   |  |  REP   |
+--------+  +--------+  +--------+
| Worker |  | Worker |  | Worker |
+--------+  +--------+  +--------+