[Captain Kwok]

Not quite...

Each cluster has it's own hyperspace hub that connects to each other system in the cluster. That one hyperspace hub connects to the central hub, where one can travel to other cluster's hyperspace hubs and then onto the various systems in that cluster. Does that make any sense?

s s s s s s
s s s | s s s s
s \ H H
\ \ /
H - - - H2 - - /
|
s - H - /
s s s
s s

s = system
H = Hyperspace Hub
H2 = Central Hub

The systems are not connected to each other, only through the hub.