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