Remote Procedure Call (RPC) is a digital communication model that makes talking with remote machines similar to talking with a local computer. The RPC protocol is used to call external services on a network without knowing much about the network's details. When an RPC call is made, the procedure's parameters are sent across a network to execute at the preferred destination. After the specified process completes, the results are sent back to the requesting instance. RPC is a common model for having clients and servers communicate with one another. An Interface Definition Language (IDL) is often used in RPC environments, which allows a developer to learn about the software's API.