From The Free On-line Dictionary of Computing (30 December 2018) :
session layer
ISO 8326
ISO 8327
layer 5
X.215
X.225
The third highest protocol layer (layer 5) in the
OSI
seven layer model. The session layer uses the transport
layer to establish a connection between processes on
different hosts. It handles security and creation of the
session. It is used by the presentation layer.
ITU+Rec.+X.225+({ISO">Documents: ITU Rec. X.225 ({ISO 8327), ITU Rec. X.215 (ISO
8326).
[Examples?]
(1997-12-07)