< networking > 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.
(1997-08-03)