Format: sda> net show tpcons tpcbs A TPCB is a data structure describing a TPCONS connection. Each Transport Provider Control Block represents one TCP/IP connection. The existence of a TPCB block does NOT constitute an OSI Transport Connections until a connect initiate/accept has been requested by OSI Transport. Once this procedure has been sucessfully accomplished, the TPCB represents one or more OSI Transport connections over TCP/IP depending on the OSI Transport CLASS selected - multiplexing.