What occurs during a Remote Procedure Call (RPC) to help prevent DDoS attacks?

During a Remote Procedure Call (RPC), blocking the client to allow server processing time can be a mechanism for managing resources and preventing Denial of Service (DoS) conditions from escalating into Distributed Denial of Service (DDoS) attacks. When a server is overwhelmed with concurrent requests, it can become unresponsive to legitimate traffic. By blocking a client, the server can control the flow of incoming requests, ensuring that it has adequate resources to process existing requests without being swamped by new ones.

This approach helps maintain server integrity and availability by pacing the acceptance of incoming requests. It effectively mitigates the risk of overloading server resources, which is a key vulnerability that attackers often exploit during DDoS attacks.

Other options suggest either rejecting all requests, processing all simultaneously, or maintaining open-ended communication without limits, which do not adequately manage resource allocation and could lead to an unmanageable flood of requests. Thus, blocking certain clients temporarily while prioritizing server processing contributes to a structured and secure operational environment during RPC interactions.