The capability to run OSI applications over a TCP/IP network is made available in accordance with the following Request for Comments (RFC) document:

RFC 1006ISO Transport Service on top of 
 the TCP Version: 3, May 1987

This standard serves as a basis for providing the interface between the transport layer of the OSI stack and the transport layer of the TCP/IP stack.

You are provided with the capability to run OSI applications over TCP/IP as an additional enhancement to existing TCP/IP services offered, such as running TCP/IP applications over a TCP/IP network.