Before the arrival of Web services, other technologies and architectures existed that met the functionality of todayÃÂ´s web service. Microsoft's version of these technologies, are called Component Object Model (COM), and subsequently Distributed COM (DCOM). WinDNA is a comprehensive term for implementing the above two distributed software development technologies. These technologies typically use the TCP/IP protocol.
CORBA - Common Object Request Broker is a competitor of COM, developed by a consortium of vendors called the Object Management Group. Although these technologies were a breakthrough in distributed computing and served such ends well for at least five years, there were many limitations. Concerning
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