+-----------+                +------------+
| Upstream1 |                | Upstream 2 |
+-----------+                +------------+
      |                            |
      |                            | ADSL
      |                      +------------+
      |                      | ADSL Modem |
      |                      +------------+
      |                            | LAN
      |                            |
      |                   WAN  +-------------+
      +------------------------| Home server |
                               +-------------+
                                   |
        +------------------+-------+-----+ ...
        |                  |             |
     +-------------+ +----------+ +-----------+
     | Workstation | | Notebook | | Wifi AP   |
     +-------------+ +----------+ +-----------+