SENA SS800 - Manual (Page 11)

11
 Session
A series of interactions between two communication end points that occur during the span of a single
connection
Typically, one end point requests a connection with another specified end point. If that end point
replies and agrees to the connection, the end points take turns exchanging commands and data
("talking to each other"). The session begins when the connection is established at both ends and
terminates when the connection is ended.
 Client/Server
Client/server describes the relationship between two computer programs in which one program, the
client, makes a service request from another program, the server, which fulfills the request.
A server is a computer program that provides services to other computer programs on one or many
computers. The client is the requesting program or user in a client/server relationship. For example,
the user of a Web browser is effectively making client requests for pages from servers all over the
Web. The browser itself is a client in its relationship with the computer that is getting and returning the
requested HTML file. The computer handling the request and sending back the HTML file is a server.