+---------+
                       |         |
                       |   VNF   |
                       |         |
                       +---------+
                            ^
                            |
+---------------------------+---------+
|                                     |
|     VNFi                            |
|                                     |
|  +-------------------------------+  |
|  |                               |  |
|  |                               |  |
|  |                               |  |
|  |    +-----------+  +---------+ |  |
|  |    |           |  |         | |  |
|  |    |  Virtual  |  | Virtual | |  |
|  |    | Computing |  | Storage | |  |
|  |    |           |  |         | |  |
|  |    +-----------+  +---------+ |  |
|  |                               |  |
|  |    +------------------------+ |  |
|  |    |  Virtualization Layer  | |  |
|  |    +------------------------+ |  |
|  |                               |  |
|  +-------------------------------+  |
|                                     |
|     +------------+  +----------+    |
|     |            |  |          |    |
|     |  Computing |  |  Storage |    |
|     |  Hardware  |  | Hardware |    |
|     |            |  |          |    |
|     +------------+  +----------+    |
|                                     |
+-------------------------------------+