Client-server communication is a model used in computer networks where a client requests resources or services from a server. The client is typically a device, like a computer or smartphone, that initiates the request, while the server is a powerful computer that processes these requests and provides the necessary data or services. This interaction allows users to access information and applications over the internet. In this model, communication occurs through a set of protocols, such as HTTP for web browsing or FTP for file transfers. The client sends a request to the server, which then responds with the requested information. This efficient exchange enables various online activities, from browsing websites to streaming videos.