What is the connection-transaction-request-session-

Hi,

So first of explain what is connection and session. let's define first the term Flow.

The definition of a Flow is historically accepted as:

A unidirectional sequence of packets between 2 network endpoints that have the following 7 things in common:

• Source IP address
• Destination IP address
• L3 Protocol type
• Source port
• Destination port
• Tos (Type of Service)
• Input interface

The terms Connection and Session can have many different meanings depending on the framework that they are used, but it can be said that:

• Connection: A bidirectional Flow (Connection will have two flows - forward and reverse flows.)

• Session: Many connections between the same source and same destination

   

• Transaction is nothing but a group of requests in web terminology. transactions only encapsulate requests into a group e.g. a login operation which involves 5 http requests can be group together into a single transaction by me

   

• Request is formal http request we do as ussual, transaction is considered as a sequence of requests.