What is request-reply protocol?

The request-reply protocol is a communication pattern used in distributed systems where a client sends a request to a server and waits for a response. This protocol is synchronous, meaning the client is blocked until it receives a reply, ensuring that the interaction is straightforward and easier to manage. It is commonly used in various applications, such as web services and messaging systems, where clear and direct communication is essential. The protocol's simplicity makes it suitable for many use cases, though it may introduce latency if the server takes time to respond.