# Clients

@subpage gtfpga
@subpage opal

Every server needs clients which act as sinks / sources for simulation data. In case of S2SS these clients are called _nodes_.

Take a look at the `clients/` directory for them:

 - RTDS UDP Network Card ?
 - RTDS via GTFPGA
 - OPAL
 - Labview
 - Simulink