@wolf480pl their model names are confusing as heck anyways. Theres no way to tell where the board name stops and port number starts. They seem to just break or change the rules when they feel like it.

For example the RB4011 is an RB4 or RB4000 i presume, with 11 ports. And the RB5009 is one level higher and it has 9 ports.

But the RB1100 sure as heck doesn't have 100 ports.