session
1. A lasting connection between a user (or user agent) and a peer, typically a server, usually involving the exchange of many packets between the user's computer and the server. A session is typically implemented as a layer in a network protocol (e.g. telnet, FTP).
In the case of protocols where there is no concept of a session layer (e.g. UDP) or where sessions at the session layer are generally very short-lived (e.g. HTTP), virtual sessions are implemented by having each exchange between the user and the remote host include some form of cookie which stores state (e.g. a unique session ID, information about the user's preferences or authorisation level, etc.). See also login. 2. A lasting connection using the session layer of a networking protocol.Last updated: 1997-08-03
Session Initiation Protocol
<protocol>
(SIP) A very simple text-based application-layer control protocol. It creates, modifies, and terminates sessions with one or more participants. Such sessions include Internet telephony and multimedia conferences.
It is described in RFC 2543.Last updated: 2000-05-31
session layer
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.
Documents: ITU Rec. X.225 (ISO 8327), ITU Rec. X.215 (ISO 8326). [Examples?]Last updated: 1997-12-07
SES/workbench
<tool, simulation>
An iconic simulation and design tool, linked to some of the major CASE systems now available or in development.
Last updated: 1996-03-28
Nearby terms:
Service Set Identifier ♦ servlet ♦ session ♦ Session Initiation Protocol ♦ session layer
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