A port is a data structure describing a transport
         connection.

1  –  RSP

 	Specify a Remote Service Provider to select those ports.

 	This will in effect, list all OSI Transport connections
 	that exist between a specific local service provider and
 	a specific remote service provider .

 	NOTE: There exists one Local Service Provider per local NSAP.
 	      There exists one Remote Service Provider per remote NSAP.

2  –  NCCB

 	Specify a Network Connection Block to select those ports.

 	This will list all the transport connections, using a existing over
 	a specific network connection.