RPC is the fundamental abstraction enabling the execution procedures on clients’ requests.
RPC allows extending the concept of a procedure call beyond the boundaries of a process and a single memory address space.
The called procedure and calling procedure may be on the same system or they may be on different systems..
Distributed Object Frameworks
Extend object-oriented programming systems by allowing objects to be distributed across a heterogeneous network and provide facilities so that they can coherently act as though they were in the same address space.
Web Services
Web Services are the prominent technology for implementing SOA systems and applications.
They leverage Internet technologies and standards for building distributed systems.
Several aspects make Web Services the technology of choice for SOA.
First, they allow for interoperability across different platforms and programming languages.
Second, they are based on well-known and vendor-independent standards such as HTTP, SOAP, and WSDL.
Third, they provide an intuitive and simple way to connect heterogeneous software systems, enabling quick composition of services in a distributed environment.
