5. Web Service VS Web Pages Network Transport Messaging Description Discovery UDDI, WSIL, ebXML WSDL, RDF, ebXML SOAP, XML-RPC(XML) HTTP, SMTP, FTP TCP/IP, UDP LAYERS PROTOCOL/STANDARD
6. Consuming Web Services Service Listener Service Interface Service Implementation Network Calls SOAP Response Execution Return Values/Result Php code SOAP implementation & WSDL Description Apache HTTP server SOAP request via HTTP POST
7. Consuming Web Services Way: SOAP: Simple Object Access Protocol XML-PRC: XML Remote Procedure Call REST : Representational State Transfer