Which protocol is mainly used in web services?

The protocols used in web services are

1.Transport Protocol: used for transporting messages between network applications and includes protocols such as HTTP(s), SMTP, FTP, as well as the recent Blocks Extensible Exchange Protocol (BEEP).

2.Messaging Protocol: used for encoding messages so that they are understood at either end of a network connection.Some protocols are XML-RPC, WS-Addressing, REST and SOAP.

3.Description Protocol: used for describing the public interface to a specific web service.The WSDL interface format is commonly used.