The session layer can maintain several connections.
As reviewed earlier, the iSCSI session layer was responsible for maintaining the video stream to the video player application on the hosts.
Level 6 Presentation Layer format selection, translation, syntax, date encoding & compression Layer 5
Session Layer open, maintain, closes an information exchange Layer 4 Transport Layer packet delivery, packaging & unpackaging messages Layer 3 Network Layer addresses, traffic & routing determination Layer 2 Data Link Layer transfer of error free data between computers through the physical layer Layer 1 Physical Layer transmission of raw data over physical medium (cable)
Some initiatives endeavor to implement security at the network IP layer; others, just above TCP, at the
session layer; still others, such as ftp, HTTP, and telnet, within specific application protocols, and a whole class of solutions for securing the content of documents (e.g., application-independent payment protocols) residing above the existing application protocols.
It consists of seven architectural layers: the physical layer; the data link layer, the network layer; the transport layer; the
session layer; the presentation layer; the application layer.
Session Layer: provides the control functions necessary to establish, manage and terminate the connections as required to satisfy the user's request.
Alacritech is launching a new line of NICs (Network Interface Cards) based on an architecture called SLIC (
Session Layer Interface Card),
Since BACNET is Connectionless,
session layers not needed [3 & 4 ].