Computer connected through computer (not Router)

[rumaak]

When computer is connected to the rest of the network through another computer, it acts as functional network (but it shouldn't). Computers shouldn't be able to forward packets. Routing tables should accomodate for this - during computation, next hop device cannot be a computer unless it is destination computer; applying this rule will result in finding alternative paths through routers / finding out that the network actually isn't correctly connected.

[rumaak]

Update: we do not need all devices to be reachable - only computers. Therefore when checking connectivity only Computer-Computer connections should be verified.