The name of the subsystem whose parameters are to be displayed.
   The subsystem name is one of:

     INET    - Internet network-specific parameters
     NET     - General network parameters
     SOCKET  - Socket-specific parameters

   Other subsystems may have been loaded by sysconfig (for example,
   NFS and VFS).  To display a complete list of dynamically loaded
   subsystems, use the TCPIP SHOW SUBSYSTEMS command.