Message and Chnannels

Message

        

       WCF Message is the unit of data exchange between client and service. It consists of several parts, including a body and headers.

WCF Runtime

       WCF runtime is the set of object responsible for sending and receiving message. For example formatting the message, applying security and transmitting and receiving message using various protocol.

Channels:

       

       Channels are the core abstraction for sending message to and receiving message from an Endpoint. Broadly we can categories channels as

Transport Channels

      

        Handles sending and receiving message from network. Protocols like HTTP, TCP name pipes and MSMQ.

Protocol Channels

      

        Implements SOAP based protocol by processing and possibly modifying message. e.g. WS-Security and WS-Reliability.