FTL Nodes provide a signal that FTL Drives can lock onto. The signal allows the drive to home in to that point, rendering accurate long range FTL jumps possible. Methods to mask a FTL Node, preventing its detection and use by outsiders, are possible.
It is known that Shaltari FTL Drives do not require FTL Nodes. However it is suspected that Scourge FTL Drives do require FTL Nodes and needed the nodes present for Earth and the Cradle Worlds to facilitate their invasion.
Human FTL Nodes and Node Networks:
Other Known FTL Nodes and Node Networks: