You can find a solution in recommendations X.215/X.225 ... :-) We did have a standardized solution to this 40 years ago, in 1984. But it was too ambitious - you couldn't give IT students a homework assignment of implementing the OSI Session Layer. You could have them making a primitive implementation of, say, (too) Simple Mail Transfer Protocol, (too) Simple Network Management Protocol or (too) Simple File Transfer Protocol. Besides, the Internet standards were freely available, while OSI specs were copyrighted and expensive. So the Internet Protocol Suite won the war against OSI. In 1984, you may say that OSI Session was overkill (considering resources available at the time). If it had been generally available for 40 years, we certainly wouldn't have considered it overkill today. There might be running implementations out there, even today, but I don't know of any.