The picture is stupid. IP networks were not designed with the seven-layer OSI model in mind, and, generally speaking, whenever someone talks about layers five and six in the context of a IP-based protocol they don’t understand what they are talking about.
In the OSI reference model, it was opined that people would build common session and presentation management protocols on top of the transport layer. That, by and large, didn’t happen with IP.
Edit: I am not exactly sure of the distinction between HTTP and FTP in the layers.