What is a Binding ?

What is Binding in Windows Communication Foundation ?
Windows Communication Foundation is a framework for building services that process XML messages. Windows Communication Foundation allows you to transmit messages using different transport protocols (such as HTTP, TCP, and MSMQ) and using different XML representations (such as text, binary, or MTOM, which is commonly referred to as the message encoding in Windows Communication Foundation). In addition, you can enhance specific messaging interactions with a suite of SOAP protocols, such as the various WS-* specifications around security, reliable messaging, and transactions. All three of these communication concepts—the transport, the message encoding, and the suite of protocols—are central to what happens on the wire at run time.