follow this link : http://www.dotnet-tricks.com/Tutorial/wcf/VE8a200713-Understanding-various-types-of-WCF-bindings.html

Totally 9 types of contracts exists in WCF1) basicHttpBinding 2) wsHttpBinding 3) NetTcpBinding 4) WebHttpBinding 5) NetMSMQBinding 6) NetNamedPipeBinding 7) WSFederatedBinding 8) WSDualHttpBinding 9) NetPeerTCPBinding 10) MsMqIntegrationBinding