ABC of wcf

ABC in WCF
          A-->   Address
          B --> Binding
          C --> Contract

for ex WCF url:   http://localhost:111/myServiceHots.svc

localhost:111/myServiceHots.svc--> Address i.e server ,port and endpoint

http  is Binding,  Binding protocol,  it can be http,https, net.tccpip, net.msmq, net.pipe.
Contract  -->  its a mutual agreement between client and wcf service
                                  Contracts can be DataContract
                                                            ServiceContract
                                                            MessageContract.