In JMS, session represents (roughly) a connection, or a socket. More precisely, one or more sessions are created from a single live connection. In JMS, sessions are single-threaded.
In RV, transport is the terminology. Means the same as a session, a socket, a connection to the “network”, to the daemon… Transport is a real object in memory.
In hibernate, session represents a connection to the DB. More precisely, a hibernate session HAS-A real connection object in memory