7. What is the difference between OPC and DCOM?
What is the difference between OPC and DCOM?
The classic OPC specifications are implementation of Microsoft Component Object Model (COM) and Distributed Component Object Model (DCOM). OPC relies on DCOM for data transportation. The OPC specifies the interface that transfers between applications that use OPC, and DCOM is the actual transfer protocol. So while OPC states how the information is transferred between applications, DCOM handles the transfer itself. DCOM also provides the security aspects like authentication and encryption.
