Connection versus Session

Often people who are studying the networking are confused with the concept of What is difference between connection and session.

Connection and Session are different Things Altogether

A connection is a transport level connection between two peers, used to send and receive Diameter messages.
A session is a logical concept at the application layer, and is shared between an access device and a server, and is identified via the Session-Id AVP.


+--------+            +---------+             +----------+
| Client |             | Relay |              | Server |
+--------+            +---------+             +----------+


           <---------->           <----------->
     peer connection A    peer connection B


<------------------------------------------------------------>
                      User session x






[From RFC 3588]