..... USA ......              ..... Europe ......

        NOC1                           NOC2
         |                              |
         |            metric 100        |
       ACP1 --------------------------- ACP2  .
         |                              |     . WAN
         | metric 10          metric 20 |     . Core
         |                              |     . 
       ACP3 --------------------------- ACP4  .
         |            metric 100        |
         |                              |     .
         |                              |     . Sites
       ACP10                           ACP11  .