CREST Practitioner Security Analyst (CPSA) Practice

What type of communication does RPC facilitate?

1. File storage

2. Remote procedure calls between clients and servers

3. Encrypted messaging

4. Broadcasting over networks

The correct answer is: Remote procedure calls between clients and servers

Remote Procedure Call (RPC) is a protocol that enables communication between a client and a server in a networked environment. Specifically, it allows a program on one computer (the client) to execute a procedure or function on a remote server and receive the results. This process abstracts the complexities of direct networking, enabling developers to call functions or procedures as if they were local to the executing machine. RPC streamlines the interaction between distributed systems, making it particularly useful for scenarios where client-server models are employed. It provides a method for invoking services remotely, all while maintaining the concept of a procedure call, which simplifies development and enhances system modularity. In contrast, the other choices do not accurately reflect the core purpose of RPC. File storage pertains to data management rather than inter-process communication. Encrypted messaging is focused on securing communication rather than enabling function calls, and broadcasting over networks describes a method of transmitting messages to multiple recipients rather than executing remote procedure calls. Thus, the correct answer highlights the primary functionality of RPC in facilitating communication for remote procedure execution.